56571057 has 12 divisors (see below), whose sum is σ = 82699344. Its totient is φ = 37259160.

The previous prime is 56571049. The next prime is 56571071. The reversal of 56571057 is 75017565.

It is not a de Polignac number, because 56571057 - 2³ = 56571049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56571157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37119 + ... + 38612.

It is an arithmetic number, because the mean of its divisors is an integer number (6891612).

Almost surely, 2^56571057 is an apocalyptic number.

It is an amenable number.

56571057 is a deficient number, since it is larger than the sum of its proper divisors (26128287).

56571057 is a wasteful number, since it uses less digits than its factorization.

56571057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75820 (or 75817 counting only the distinct ones).

The product of its (nonzero) digits is 36750, while the sum is 36.

The square root of 56571057 is about 7521.3733453406. The cubic root of 56571057 is about 383.8823084964.

The spelling of 56571057 in words is "fifty-six million, five hundred seventy-one thousand, fifty-seven".