56321816 has 16 divisors (see below), whose sum is σ = 111815640. Its totient is φ = 26504320.

The previous prime is 56321809. The next prime is 56321831. The reversal of 56321816 is 61812365.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206930 + ... + 207201.

Almost surely, 2^56321816 is an apocalyptic number.

It is an amenable number.

56321816 is a deficient number, since it is larger than the sum of its proper divisors (55493824).

56321816 is a wasteful number, since it uses less digits than its factorization.

56321816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414154 (or 414150 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 56321816 is about 7504.7862061487. The cubic root of 56321816 is about 383.3177084158.

The spelling of 56321816 in words is "fifty-six million, three hundred twenty-one thousand, eight hundred sixteen".