56257131 has 32 divisors (see below), whose sum is σ = 93242880. Its totient is φ = 29431296.

The previous prime is 56257127. The next prime is 56257139. The reversal of 56257131 is 13175265.

It is not a de Polignac number, because 56257131 - 2² = 56257127 is a prime.

It is a super-2 number, since 2×56257131² = 6329729576702322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56257139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11080 + ... + 15338.

It is an arithmetic number, because the mean of its divisors is an integer number (2913840).

Almost surely, 2^56257131 is an apocalyptic number.

56257131 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

56257131 is a deficient number, since it is larger than the sum of its proper divisors (36985749).

56257131 is a wasteful number, since it uses less digits than its factorization.

56257131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4323.

The product of its digits is 6300, while the sum is 30.

The square root of 56257131 is about 7500.4753849339. The cubic root of 56257131 is about 383.1709067795.

The spelling of 56257131 in words is "fifty-six million, two hundred fifty-seven thousand, one hundred thirty-one".