56423531 has 12 divisors (see below), whose sum is σ = 60997872. Its totient is φ = 52091424.

The previous prime is 56423519. The next prime is 56423533. The reversal of 56423531 is 13532465.

It is not a de Polignac number, because 56423531 - 2⁶ = 56423467 is a prime.

It is a super-2 number, since 2×56423531² = 6367229701015922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56423494 and 56423503.

It is not an unprimeable number, because it can be changed into a prime (56423533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17885 + ... + 20801.

It is an arithmetic number, because the mean of its divisors is an integer number (5083156).

Almost surely, 2^56423531 is an apocalyptic number.

56423531 is a deficient number, since it is larger than the sum of its proper divisors (4574341).

56423531 is a wasteful number, since it uses less digits than its factorization.

56423531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2998 (or 2969 counting only the distinct ones).

The product of its digits is 10800, while the sum is 29.

The square root of 56423531 is about 7511.5598246969. The cubic root of 56423531 is about 383.5483219154.

Adding to 56423531 its reverse (13532465), we get a palindrome (69955996).

The spelling of 56423531 in words is "fifty-six million, four hundred twenty-three thousand, five hundred thirty-one".