56521140 has 96 divisors (see below), whose sum is σ = 171714816. Its totient is φ = 13808640.

The previous prime is 56521123. The next prime is 56521151. The reversal of 56521140 is 4112565.

It is a self number, because there is not a number n which added to its sum of digits gives 56521140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181585 + ... + 181895.

It is an arithmetic number, because the mean of its divisors is an integer number (1788696).

Almost surely, 2^56521140 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 56521140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85857408).

56521140 is an abundant number, since it is smaller than the sum of its proper divisors (115193676).

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

56521140 is a wasteful number, since it uses less digits than its factorization.

56521140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569 (or 567 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 56521140 is about 7518.0542695567. The cubic root of 56521140 is about 383.7693656296.

The spelling of 56521140 in words is "fifty-six million, five hundred twenty-one thousand, one hundred forty".