57155131 has 16 divisors (see below), whose sum is σ = 63882720. Its totient is φ = 50699520.

The previous prime is 57155113. The next prime is 57155159. The reversal of 57155131 is 13155175.

It is a cyclic number.

It is not a de Polignac number, because 57155131 - 2⁵ = 57155099 is a prime.

It is a super-2 number, since 2×57155131² = 6533417999254322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 57155131.

It is not an unprimeable number, because it can be changed into a prime (57155191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87201 + ... + 87853.

It is an arithmetic number, because the mean of its divisors is an integer number (3992670).

Almost surely, 2^57155131 is an apocalyptic number.

57155131 is a deficient number, since it is larger than the sum of its proper divisors (6727589).

57155131 is a wasteful number, since it uses less digits than its factorization.

57155131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846.

The product of its digits is 2625, while the sum is 28.

The square root of 57155131 is about 7560.1012559357. The cubic root of 57155131 is about 385.1989324428.

The spelling of 57155131 in words is "fifty-seven million, one hundred fifty-five thousand, one hundred thirty-one".