| Fine.
57 (number)
From Wikipedia, the free encyclopedia
57 (fifty-seven) is the natural number following 56 and preceding 58.
[edit] In mathematics
57 is a 20-gonal number. It is a Leyland number since 25 + 52 = 57.
57 is a repdigit in base 7 (111).
See also 57-cell. |