56531380 has 24 divisors (see below), whose sum is σ = 119508480. Its totient is φ = 22461600.

The previous prime is 56531359. The next prime is 56531429. The reversal of 56531380 is 8313565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6340 + ... + 12379.

It is an arithmetic number, because the mean of its divisors is an integer number (4979520).

Almost surely, 2^56531380 is an apocalyptic number.

It is an amenable number.

56531380 is an abundant number, since it is smaller than the sum of its proper divisors (62977100).

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

56531380 is a wasteful number, since it uses less digits than its factorization.

56531380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18879 (or 18877 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 56531380 is about 7518.7352659872. The cubic root of 56531380 is about 383.7925402094.

The spelling of 56531380 in words is "fifty-six million, five hundred thirty-one thousand, three hundred eighty".