56403831 has 16 divisors (see below), whose sum is σ = 83952000. Its totient is φ = 33388320.

The previous prime is 56403827. The next prime is 56403857. The reversal of 56403831 is 13830465.

It is not a de Polignac number, because 56403831 - 2² = 56403827 is a prime.

It is a super-2 number, since 2×56403831² = 6362784302953122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56403871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18456 + ... + 21293.

It is an arithmetic number, because the mean of its divisors is an integer number (5247000).

Almost surely, 2^56403831 is an apocalyptic number.

56403831 is a deficient number, since it is larger than the sum of its proper divisors (27548169).

56403831 is a wasteful number, since it uses less digits than its factorization.

56403831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39806.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 56403831 is about 7510.2483980225. The cubic root of 56403831 is about 383.5036787122.

The spelling of 56403831 in words is "fifty-six million, four hundred three thousand, eight hundred thirty-one".