56 (number)

56 (fifty-six) is the natural number following 55 and preceding 57.

List of numbersIntegers

<< 50 51 52 53 54 55 56 57 58 59 >>

Cardinalfifty-six
Ordinal56th (fifty-sixth)
Factorization<math>2^3\cdot 7<math>
Divisors 2, 4, 7, 8, 14, 28
Roman numeralLVI
Binary111000
Hexadecimal38

In mathematics

56 is the sum of the first six triangular numbers (making it a tetrahedral number), as well as the sum of six consecutive primes (3 + 5 + 7 + 11 + 13 + 17). It is also a tetranacci number and a pronic number.

In science

In astronomy,

Messier object M56, a magnitude 9.5 globular cluster in the constellation Lyra
The New General Catalogue object (http://www.ngcic.org/) NGC 56, an unverified object in the constellation Pisces. NGC 76 does not appear to be a real object.
The Saros number (http://sunearth.gsfc.nasa.gov/eclipse/SEsaros/SEsaros1-175.html) of the solar eclipse series which began on -1172 July 17 and ended on 144 September 15. The duration of Saros series 56 was 1316.2 years, and it contained 74 solar eclipses.
The Saros number (http://sunearth.gsfc.nasa.gov/eclipse/LEsaros/LEsaros1-175.html) of the lunar eclipse series which began on -852 May 7 and ended on 428 June 13. The duration of Saros series 56 was 1280.1 years, and it contained 72 lunar eclipses.

In other fields

56 is also: .

es:Cincuenta y seis ko:56 ia:56 it:Cinquantasei ja:56 zh:56

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