57 (Number)

57 is the natural number following 56 and preceding 58.
Cardinalfifty-seven
Ordinal57th (fifty-seventh)
Factorization3\cdot 19
Roman numeralLVII
Binary111001
Hexadecimal39

In mathematics

57 is a 20-gonal number.

In science

In astronomy,
Messier object M57, a magnitude 9.5 planetary nebula in the constellation Lyra, also known as the Ring Nebula
The New General Catalogue object NGC 57, an elliptical galaxy in the constellation Pisces
The Saros number of the solar eclipse series which began on -1161 June 17 and ended on 137 August 4. The duration of Saros series 57 was 1298.1 years, and it contained 73 solar eclipses.
The Saros number of the lunar eclipse series which began on -823 April 16 and ended on 475 June 5. The duration of Saros series 57 was 1298.1 years, and it contained 73 lunar eclipses.

In other Fields

Fifty-seven is also:

 

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