56403231 has 32 divisors (see below), whose sum is σ = 80559360. Its totient is φ = 35046144.

The previous prime is 56403169. The next prime is 56403239. The reversal of 56403231 is 13230465.

It is a happy number.

It is not a de Polignac number, because 56403231 - 2²³ = 48014623 is a prime.

It is a super-2 number, since 2×56403231² = 6362648934478722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56403239) 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, 527080 + ... + 527186.

It is an arithmetic number, because the mean of its divisors is an integer number (2517480).

Almost surely, 2^56403231 is an apocalyptic number.

56403231 is a deficient number, since it is larger than the sum of its proper divisors (24156129).

56403231 is a wasteful number, since it uses less digits than its factorization.

56403231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 56403231 is about 7510.2084524998. The cubic root of 56403231 is about 383.5023188576.

Adding to 56403231 its reverse (13230465), we get a palindrome (69633696).

The spelling of 56403231 in words is "fifty-six million, four hundred three thousand, two hundred thirty-one".