55 (number)
Encyclopedia
55 is the natural number
following 54
and preceding 56
.
It is a heptagonal number, a centered nonagonal number
, and a triangular number
(the sum of the numbers 1 to 10) and a square pyramidal number
(the sum of the squares of the integer
s 1 to 5). It is also a Fibonacci number
(the largest Fibonacci number to also be a triangular number) and a Kaprekar number
.
55 is a semiprime
, being the product of 5 and 11
and it is the 2nd member of the (5.q) semiprime family. 55 is one of only two integers with an aliquot sum of 17
(the other being 39
). 55 has an aliquot sequence
of 4 members: (55, 17, 1, 0).
Natural number
In mathematics, the natural numbers are the ordinary whole numbers used for counting and ordering . These purposes are related to the linguistic notions of cardinal and ordinal numbers, respectively...
following 54
54 (number)
54 is the natural number following 53 and preceding 55.-In mathematics:54 is a 19-gonal number. Twice the third power of three, 54 is a Leyland number. 54 can be written as the sum of three squares in three different ways: 7^2 + 2^2 + 1^2 = 6^2 + 2 = 2 + 2^2 = 54. It is the smallest number with...
and preceding 56
56 (number)
56 is the natural number following 55 and preceding 57.- Mathematics :56 is the sum of the first six triangular numbers , as well as the sum of six consecutive primes . It is also a tetranacci number and a pronic number. Adding up the divisors of 1 through 8 gives 56...
.
Albania
- Gazeta 55Gazeta 55Gazeta 55 is an Albanian language newspaper published in Tirana, Albania. Gazeta 55 is a politically unaffiliated daily with nine reporters on staff...
, a newspaper - Constitution law 55Agitation and Propaganda against the StateConstitution 55 or Agitation and Propaganda against the State was a criminal offence in Communist Albania. This law was used from 1945 until 1991 and was into the Constitution of the People's Socialist Republic of Albania....
, a law during Communist Albania.
Mathematics
Fifty-five has the interesting property that it is the 10th Fibonacci number and the sum of the numbers 1 to 10.It is a heptagonal number, a centered nonagonal number
Centered nonagonal number
A centered nonagonal number is a centered figurate number that represents a nonagon with a dot in the center and all other dots surrounding the center dot in successive nonagonal layers...
, and a triangular number
Triangular number
A triangular number or triangle number numbers the objects that can form an equilateral triangle, as in the diagram on the right. The nth triangle number is the number of dots in a triangle with n dots on a side; it is the sum of the n natural numbers from 1 to n...
(the sum of the numbers 1 to 10) and a square pyramidal number
Square pyramidal number
In mathematics, a pyramid number, or square pyramidal number, is a figurate number that represents the number of stacked spheres in a pyramid with a square base...
(the sum of the squares of the integer
Integer
The integers are formed by the natural numbers together with the negatives of the non-zero natural numbers .They are known as Positive and Negative Integers respectively...
s 1 to 5). It is also a Fibonacci number
Fibonacci number
In mathematics, the Fibonacci numbers are the numbers in the following integer sequence:0,\;1,\;1,\;2,\;3,\;5,\;8,\;13,\;21,\;34,\;55,\;89,\;144,\; \ldots\; ....
(the largest Fibonacci number to also be a triangular number) and a Kaprekar number
Kaprekar number
In mathematics, a Kaprekar number for a given base is a non-negative integer, the representation of whose square in that base can be split into two parts that add up to the original number again. For instance, 45 is a Kaprekar number, because 45² = 2025 and 20+25 = 45. The Kaprekar numbers are...
.
55 is a semiprime
Semiprime
In mathematics, a semiprime is a natural number that is the product of two prime numbers. The first few semiprimes are 4, 6, 9, 10, 14, 15, 21, 22, 25, 26, ... ....
, being the product of 5 and 11
11 (number)
11 is the natural number following 10 and preceding 12.Eleven is the first number which cannot be counted with a human's eight fingers and two thumbs additively. In English, it is the smallest positive integer requiring three syllables and the largest prime number with a single-morpheme name...
and it is the 2nd member of the (5.q) semiprime family. 55 is one of only two integers with an aliquot sum of 17
17 (number)
17 is the natural number following 16 and preceding 18. It is prime.In spoken English, the numbers 17 and 70 are sometimes confused because they sound similar. When carefully enunciated, they differ in which syllable is stressed: 17 vs 70...
(the other being 39
39 (number)
39 is the natural number following 38 and preceding 40.- In mathematics :Thirty-nine is the sum of five consecutive primes and the sum of the first three powers of 3...
). 55 has an aliquot sequence
Aliquot sequence
In mathematics, an aliquot sequence is a recursive sequence in which each term is the sum of the proper divisors of the previous term. The aliquot sequence starting with a positive integer k can be defined formally in terms of the sum-of-divisors function σ1 in the following way:For example, the...
of 4 members: (55, 17, 1, 0).
Astronomy
- Messier objectMessier objectThe Messier objects are a set of astronomical objects first listed by French astronomer Charles Messier in 1771. The original motivation of the catalogue was that Messier was a comet hunter, and was frustrated by objects which resembled but were not comets...
M55Messier 55Messier 55 is a globular cluster in the constellation Sagittarius. It was discovered by Nicolas Louis de Lacaille in 1751 and catalogued by Charles Messier in 1778. M55 is at a distance of about 17,300 light-years away from Earth. Only about half a dozen variable stars have been discovered in...
, a magnitude 7.0 globular clusterGlobular clusterA globular cluster is a spherical collection of stars that orbits a galactic core as a satellite. Globular clusters are very tightly bound by gravity, which gives them their spherical shapes and relatively high stellar densities toward their centers. The name of this category of star cluster is...
in the constellationConstellationIn modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....
SagittariusSagittarius (constellation)Sagittarius is a constellation of the zodiac, the one containing the galactic center. Its name is Latin for the archer, and its symbol is , a stylized arrow. Sagittarius is commonly represented as a centaur drawing a bow... - The New General CatalogueNew General CatalogueThe New General Catalogue of Nebulae and Clusters of Stars is a well-known catalogue of deep sky objects in astronomy. It contains 7,840 objects, known as the NGC objects...
object NGC 55NGC 55NGC 55 is a barred irregular galaxy located about 7 million light-years away in the constellation Sculptor. Along with its neighbor NGC 300, it is one the closest galaxies to the Local Group, probably lying between us and the Sculptor Group.-Nearby galaxies and group information:NGC 55 and the...
, a magnitude 7.9 barred spiral galaxyBarred spiral galaxyA barred spiral galaxy is a spiral galaxy with a central bar-shaped structure composed of stars. Bars are found in approximately two-thirds of all spiral galaxies...
in the constellation SculptorSculptor (constellation)Sculptor is a small and faint constellation in the southern sky. It represents a sculptor. It was introduced by Nicolas Louis de Lacaille in the 18th century. He originally named it Apparatus Sculptoris , but the name was later shortened.-Notable features:No stars brighter than 3rd magnitude are... - The Saros number of the solar eclipseSolar eclipseAs seen from the Earth, a solar eclipse occurs when the Moon passes between the Sun and the Earth, and the Moon fully or partially blocks the Sun as viewed from a location on Earth. This can happen only during a new moon, when the Sun and the Moon are in conjunction as seen from Earth. At least...
series which began on -1255 July 6 and ended on 43 August. The duration of Saros series 55 was 1298.1 years, and it contained 73 solar eclipses. The Saros number of the lunar eclipseLunar eclipseA lunar eclipse occurs when the Moon passes behind the Earth so that the Earth blocks the Sun's rays from striking the Moon. This can occur only when the Sun, Earth, and Moon are aligned exactly, or very closely so, with the Earth in the middle. Hence, a lunar eclipse can only occur the night of a...
series which began on -935 April 25 and ended on 345 June. The duration of Saros series 55 was 1280.1 years, and it contained 72 lunar eclipses.
Music
- A song produced by Group XGröûp XGröûp X is a faux Arabian rock band, claiming to be from the fictional village of Cramshananteen, Saudi Arabia. They play a mix of rap and rock. They are known for using comically accented and mangled English and a vaguely hostile attitude towards the United States and Americans...
was called "Schfifty Five". With the addition of a flash animation, "Schfifty Five" became a common internet memeMemeA meme is "an idea, behaviour or style that spreads from person to person within a culture."A meme acts as a unit for carrying cultural ideas, symbols or practices, which can be transmitted from one mind to another through writing, speech, gestures, rituals or other imitable phenomena... - The name of a song by British Indie Rock Band Kasabian. The song was released as a B side to Club Foot and was recorded live when the band performed at London's Brixton Academy.
- Sammy HagarSammy HagarSam Roy "Sammy" Hagar , also known as The Red Rocker, is an American rock singer, guitarist, and songwriter. Also sings Country Music....
sang "I Can't Drive 55" - Tom WaitsTom WaitsThomas Alan "Tom" Waits is an American singer-songwriter, composer, and actor. Waits has a distinctive voice, described by critic Daniel Durchholz as sounding "like it was soaked in a vat of bourbon, left hanging in the smokehouse for a few months, and then taken outside and run over with a car."...
(and later Sarah McLachlanSarah McLachlanSarah Ann McLachlan, OC, OBC is a Canadian musician, singer and songwriter. Known for her emotional ballads and mezzo-soprano vocal range, as of 2006, she has sold over 40 million albums worldwide. McLachlan's best-selling album to date is Surfacing, for which she won two Grammy Awards and four...
) sang "Ol' 55" - Cristian VogelCristian VogelCristian Vogel is an experimental electronic musician.-Biography:Cristian Vogel was born in Chile and moved to England in the mid 1970s. Vogel first began working with electronic compositions in the late 1980s with the Cabbage Head Collective...
released an album in 2005 with the title "Station 55" - Ol' 55Ol' 55Ol' 55 was an Australian band specialising in retro, 1950s-era Rock 'n' Roll. They formed as Fanis in 1972 in Sutherland, Sydney, New South Wales . Drummer Geoff Plummer was working with Glenn A. Baker at the NSW Department of Media and invited Baker to hear his part-time band, including Pat...
, an Australian rock band. - Primer 55Primer 55-History:The band was formed in 1997 by guitarist Bobby Burns, who was influenced by heavy metal music and vocalist J-Sin, who was influenced by hip hop. Burns and J-Sin enlisted the help of bassist Mike "Jr." Christopher and drummer Josh McLane...
an AmericanUnited StatesThe United States of America is a federal constitutional republic comprising fifty states and a federal district...
band - Andrew W.K.Andrew W.K.Andrew W.K. is an American singer-songwriter, multi-instrumentalist, entertainer, and motivational speaker. He is the host of the television series Destroy Build Destroy.-Early life & career:Andrew Wilkes-Krier was born in Stanford, California, and grew up in Ann Arbor, Michigan...
has an album called 55 Cadillac55 Cadillac-Release history:...
which contains the track "5" which is track five on the album, making it look like 55 in the tracklisting.
Politics
- The number of Delegates who attended the United States Constitutional ConventionPhiladelphia ConventionThe Constitutional Convention took place from May 14 to September 17, 1787, in Philadelphia, Pennsylvania, to address problems in governing the United States of America, which had been operating under the Articles of Confederation following independence from...
in 1787. - Adolf HitlerAdolf HitlerAdolf Hitler was an Austrian-born German politician and the leader of the National Socialist German Workers Party , commonly referred to as the Nazi Party). He was Chancellor of Germany from 1933 to 1945, and head of state from 1934 to 1945...
was the fifty-fifth member of the National Socialist German Workers PartyNational Socialist German Workers PartyThe National Socialist German Workers' Party , commonly known in English as the Nazi Party, was a political party in Germany between 1920 and 1945. Its predecessor, the German Workers' Party , existed from 1919 to 1920...
.
Geography
- The number of the French department MeuseMeuseMeuse is a department in northeast France, named after the River Meuse.-History:Meuse is one of the original 83 departments created during the French Revolution on March 4, 1790...
. - The code for international direct dial phone calls to BrazilBrazilBrazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...
Measurements
- In US gallonGallonThe gallon is a measure of volume. Historically it has had many different definitions, but there are three definitions in current use: the imperial gallon which is used in the United Kingdom and semi-officially within Canada, the United States liquid gallon and the lesser used United States dry...
s, a standard size of drumDrum (container)A drum is a cylindrical container used for shipping bulk cargo. Drums can be made of steel, dense paperboard , or plastics, and are generally used for the transportation and storage of liquids and powders. Drums are often certified for shipment of dangerous goods...
; see 44 gallon drum
Transportation
- The highest speed limit allowed in the United States between 1974 and 1986 per the National Maximum Speed LawNational Maximum Speed LawThe National Maximum Speed Law in the United States was a provision of the 1974 Emergency Highway Energy Conservation Act that prohibited speed limits higher than . It was drafted in response to oil price spikes and supply disruptions during the 1973 oil crisis...
. - In many states of the United StatesUnited StatesThe United States of America is a federal constitutional republic comprising fifty states and a federal district...
, a very common speed limit for rural secondary roads and many urban freeways. - The number of European route E55European route E55European route E 55 is a E-route. It passes through the following cities:Helsingborg … Helsingør – Copenhagen – Køge – Vordingborg – Nykøbing Falster – Gedser … Rostock – Berlin – Lübbenau – Dresden – Teplice – Prague – Tábor – Linz – Salzburg – Villach – Tarvisio – Udine – Palmanova – Mestre...
from HelsingborgHelsingborgHelsingborg is a city and the seat of Helsingborg Municipality, Skåne County, Sweden with 97,122 inhabitants in 2010. Helsingborg is the centre of an area in the Øresund region of about 320,000 inhabitants in north-west Scania, and is Sweden's closest point to Denmark, with the Danish city...
, Sweden to Greece. - The designation of I-55, a freeway that runs from LouisianaLouisianaLouisiana is a state located in the southern region of the United States of America. Its capital is Baton Rouge and largest city is New Orleans. Louisiana is the only state in the U.S. with political subdivisions termed parishes, which are local governments equivalent to counties...
to IllinoisIllinoisIllinois is the fifth-most populous state of the United States of America, and is often noted for being a microcosm of the entire country. With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal,...
. - Year identifier used on motor vehicles registered in the UK between 1st September 2005 and 28th February 2006.
Film
- The number of Sacha Baron CohenSacha Baron CohenSacha Noam Baron Cohen is an English stand-up comedian, actor, writer, and voice artist. He is most widely known for his portrayal of three unorthodox fictional characters: Ali G, Borat, and Brüno...
's character, Jean Girard, in the 2006 film Talladega Nights: The Ballad of Ricky BobbyTalladega Nights: The Ballad of Ricky BobbyTalladega Nights: The Ballad of Ricky Bobby is a 2006 American comedy film, directed by Adam McKay and starring Will Ferrell. The film also features John C. Reilly, Michael Clarke Duncan, Leslie Bibb, Amy Adams, Gary Cole, Jane Lynch, and Sacha Baron Cohen. Various Saturday Night Live alumni also...
. In real life, however, it is the number of Michael WaltripMichael WaltripMichael Curtis Waltrip is a semi-former professional race car driver, co-owner of Michael Waltrip Racing, and a published author. He is the younger brother of three-time NASCAR champion and racing commentator Darrell Waltrip. Waltrip is a two-time winner of the Daytona 500; having won the race in... - 55 Days at Peking55 Days at Peking55 Days at Peking is a 1963 historical epic film starring Charlton Heston, Ava Gardner, and David Niven, made by Samuel Bronston Productions, and released by Allied Artists. The movie was produced by Samuel Bronston and directed by Nicholas Ray, Andrew Marton , and Guy Green...
starred Charlton HestonCharlton HestonCharlton Heston was an American actor of film, theatre and television. Heston is known for heroic roles in films such as The Ten Commandments, Ben-Hur for which he won the Academy Award for Best Actor, El Cid, and Planet of the Apes...
and David NivenDavid NivenJames David Graham Niven , known as David Niven, was a British actor and novelist, best known for his roles as Phileas Fogg in Around the World in 80 Days and Sir Charles Lytton, a.k.a. "the Phantom", in The Pink Panther...
Sports and games
- In sports, the jersey number "55" is also known as "Double Nickels" or "Double Nicks".
- In the dice game of craps, if you roll two 5s or a "55" this is commonly known as a hard 10 or double nickels.