56517816 has 32 divisors (see below), whose sum is σ = 141494400. Its totient is φ = 18812640.

The previous prime is 56517763. The next prime is 56517821. The reversal of 56517816 is 61871565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23301 + ... + 25611.

It is an arithmetic number, because the mean of its divisors is an integer number (4421700).

Almost surely, 2^56517816 is an apocalyptic number.

It is an amenable number.

56517816 is an abundant number, since it is smaller than the sum of its proper divisors (84976584).

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

56517816 is a wasteful number, since it uses less digits than its factorization.

56517816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3339 (or 3335 counting only the distinct ones).

The product of its digits is 50400, while the sum is 39.

The square root of 56517816 is about 7517.8331984688. The cubic root of 56517816 is about 383.7618423420.

It can be divided in two parts, 565 and 17816, that added together give a palindrome (18381).

The spelling of 56517816 in words is "fifty-six million, five hundred seventeen thousand, eight hundred sixteen".