56531304 has 64 divisors (see below), whose sum is σ = 158126400. Its totient is φ = 18712512.

The previous prime is 56531303. The next prime is 56531311. The reversal of 56531304 is 40313565.

56531304 is a `hidden beast` number, since 5 + 653 + 1 + 3 + 0 + 4 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (56531303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33079 + ... + 34745.

It is an arithmetic number, because the mean of its divisors is an integer number (2470725).

Almost surely, 2^56531304 is an apocalyptic number.

56531304 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56531304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79063200).

56531304 is an abundant number, since it is smaller than the sum of its proper divisors (101595096).

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

56531304 is a wasteful number, since it uses less digits than its factorization.

56531304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839 (or 1829 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 56531304 is about 7518.7302119440. The cubic root of 56531304 is about 383.7923682209.

Adding to 56531304 its reverse (40313565), we get a palindrome (96844869).

The spelling of 56531304 in words is "fifty-six million, five hundred thirty-one thousand, three hundred four".