56431233 has 6 divisors (see below), whose sum is σ = 81511794. Its totient is φ = 37620816.

The previous prime is 56431223. The next prime is 56431237. The reversal of 56431233 is 33213465.

It is a happy number.

56431233 is a `hidden beast` number, since 5 + 643 + 12 + 3 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 56430144 + 1089 = 7512^2 + 33^2 .

It is not a de Polignac number, because 56431233 - 2⁸ = 56430977 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 56431197 and 56431206.

It is not an unprimeable number, because it can be changed into a prime (56431237) 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 5 ways as a sum of consecutive naturals, for example, 3135060 + ... + 3135077.

It is an arithmetic number, because the mean of its divisors is an integer number (13585299).

Almost surely, 2^56431233 is an apocalyptic number.

It is an amenable number.

56431233 is a deficient number, since it is larger than the sum of its proper divisors (25080561).

56431233 is a wasteful number, since it uses less digits than its factorization.

56431233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6270143 (or 6270140 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 56431233 is about 7512.0724836759. The cubic root of 56431233 is about 383.5657729960.

Adding to 56431233 its reverse (33213465), we get a palindrome (89644698).

The spelling of 56431233 in words is "fifty-six million, four hundred thirty-one thousand, two hundred thirty-three".