56133540 has 48 divisors (see below), whose sum is σ = 174639360. Its totient is φ = 14968800.

The previous prime is 56133527. The next prime is 56133587. The reversal of 56133540 is 4533165.

56133540 is a `hidden beast` number, since 5 + 613 + 3 + 5 + 40 = 666.

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

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, 51436 + ... + 52515.

It is an arithmetic number, because the mean of its divisors is an integer number (3638320).

Almost surely, 2^56133540 is an apocalyptic number.

It is an amenable number.

56133540 is an abundant number, since it is smaller than the sum of its proper divisors (118505820).

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

56133540 is a wasteful number, since it uses less digits than its factorization.

56133540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103969 (or 103961 counting only the distinct ones).

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

The square root of 56133540 is about 7492.2319771881. The cubic root of 56133540 is about 382.8901056546.

The spelling of 56133540 in words is "fifty-six million, one hundred thirty-three thousand, five hundred forty".