57516631 has 4 divisors (see below), whose sum is σ = 57535200. Its totient is φ = 57498064.

The previous prime is 57516617. The next prime is 57516647. The reversal of 57516631 is 13661575.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57516631 - 2⁹ = 57516119 is a prime.

It is a super-2 number, since 2×57516631² = 6616325683180322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57516601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3391 + ... + 11248.

It is an arithmetic number, because the mean of its divisors is an integer number (14383800).

Almost surely, 2^57516631 is an apocalyptic number.

57516631 is a deficient number, since it is larger than the sum of its proper divisors (18569).

57516631 is a wasteful number, since it uses less digits than its factorization.

57516631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18568.

The product of its digits is 18900, while the sum is 34.

The square root of 57516631 is about 7583.9719804335. The cubic root of 57516631 is about 386.0093400695.

The spelling of 57516631 in words is "fifty-seven million, five hundred sixteen thousand, six hundred thirty-one".