56231240 has 64 divisors (see below), whose sum is σ = 144290160. Its totient is φ = 19537920.

The previous prime is 56231221. The next prime is 56231281. The reversal of 56231240 is 4213265.

It can be written as a sum of positive squares in 8 ways, for example, as 14577124 + 41654116 = 3818^2 + 6454^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5660 + ... + 12020.

Almost surely, 2^56231240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56231240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72145080).

56231240 is an abundant number, since it is smaller than the sum of its proper divisors (88058920).

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

56231240 is a wasteful number, since it uses less digits than its factorization.

56231240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6402 (or 6398 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 56231240 is about 7498.7492290381. The cubic root of 56231240 is about 383.1121160088.

The spelling of 56231240 in words is "fifty-six million, two hundred thirty-one thousand, two hundred forty".