56731023 has 48 divisors (see below), whose sum is σ = 93090816. Its totient is φ = 34369920.

The previous prime is 56731019. The next prime is 56731033. The reversal of 56731023 is 32013765.

It is a happy number.

It is a Cunningham number, because it is equal to 7532²-1.

It is not a de Polignac number, because 56731023 - 2² = 56731019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56731033) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 127840 + ... + 128282.

It is an arithmetic number, because the mean of its divisors is an integer number (1939392).

Almost surely, 2^56731023 is an apocalyptic number.

56731023 is a deficient number, since it is larger than the sum of its proper divisors (36359793).

56731023 is a wasteful number, since it uses less digits than its factorization.

56731023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 56731023 is about 7531.9999336166. Note that the first 4 decimals coincide. The cubic root of 56731023 is about 384.2438026957.

Adding to 56731023 its reverse (32013765), we get a palindrome (88744788).

The spelling of 56731023 in words is "fifty-six million, seven hundred thirty-one thousand, twenty-three".