56531004 has 24 divisors (see below), whose sum is σ = 138848640. Its totient is φ = 17851824.

The previous prime is 56530993. The next prime is 56531009. The reversal of 56531004 is 40013565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56531009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123744 + ... + 124199.

It is an arithmetic number, because the mean of its divisors is an integer number (5785360).

Almost surely, 2^56531004 is an apocalyptic number.

It is an amenable number.

56531004 is an abundant number, since it is smaller than the sum of its proper divisors (82317636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56531004 is a wasteful number, since it uses less digits than its factorization.

56531004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247969 (or 247967 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 56531004 is about 7518.7102617404. The cubic root of 56531004 is about 383.7916893173.

Adding to 56531004 its reverse (40013565), we get a palindrome (96544569).

The spelling of 56531004 in words is "fifty-six million, five hundred thirty-one thousand, four".