56511500 has 24 divisors (see below), whose sum is σ = 123422208. Its totient is φ = 22604400.

The previous prime is 56511493. The next prime is 56511509. The reversal of 56511500 is 511565.

It is not an unprimeable number, because it can be changed into a prime (56511509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56012 + ... + 57011.

It is an arithmetic number, because the mean of its divisors is an integer number (5142592).

Almost surely, 2^56511500 is an apocalyptic number.

56511500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

56511500 is an abundant number, since it is smaller than the sum of its proper divisors (66910708).

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

56511500 is a wasteful number, since it uses less digits than its factorization.

56511500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113042 (or 113030 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 56511500 is about 7517.4131188860. The cubic root of 56511500 is about 383.7475463774.

The spelling of 56511500 in words is "fifty-six million, five hundred eleven thousand, five hundred".