56887831 has 32 divisors (see below), whose sum is σ = 80898048. Its totient is φ = 38499840.

The previous prime is 56887829. The next prime is 56887841. The reversal of 56887831 is 13878865.

It is a cyclic number.

It is not a de Polignac number, because 56887831 - 2¹ = 56887829 is a prime.

It is a super-2 number, since 2×56887831² = 6472450631769122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56887801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15346 + ... + 18688.

It is an arithmetic number, because the mean of its divisors is an integer number (2528064).

Almost surely, 2^56887831 is an apocalyptic number.

56887831 is a deficient number, since it is larger than the sum of its proper divisors (24010217).

56887831 is a wasteful number, since it uses less digits than its factorization.

56887831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3391.

The product of its digits is 322560, while the sum is 46.

The square root of 56887831 is about 7542.4022035423. The cubic root of 56887831 is about 384.5975014321.

The spelling of 56887831 in words is "fifty-six million, eight hundred eighty-seven thousand, eight hundred thirty-one".