56515889 has 16 divisors (see below), whose sum is σ = 59473920. Its totient is φ = 53660880.

The previous prime is 56515859. The next prime is 56515897. The reversal of 56515889 is 98851565.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56515889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56515859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 431354 + ... + 431484.

It is an arithmetic number, because the mean of its divisors is an integer number (3717120).

Almost surely, 2^56515889 is an apocalyptic number.

It is an amenable number.

56515889 is a deficient number, since it is larger than the sum of its proper divisors (2958031).

56515889 is a wasteful number, since it uses less digits than its factorization.

56515889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380.

The product of its digits is 432000, while the sum is 47.

The square root of 56515889 is about 7517.7050354480. The cubic root of 56515889 is about 383.7574807823.

The spelling of 56515889 in words is "fifty-six million, five hundred fifteen thousand, eight hundred eighty-nine".