56358921 has 16 divisors (see below), whose sum is σ = 79352640. Its totient is φ = 35481600.

The previous prime is 56358889. The next prime is 56358941. The reversal of 56358921 is 12985365.

It is not a de Polignac number, because 56358921 - 2⁵ = 56358889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56358921.

It is not an unprimeable number, because it can be changed into a prime (56358941) 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, 18721 + ... + 21521.

It is an arithmetic number, because the mean of its divisors is an integer number (4959540).

Almost surely, 2^56358921 is an apocalyptic number.

It is an amenable number.

56358921 is a deficient number, since it is larger than the sum of its proper divisors (22993719).

56358921 is a wasteful number, since it uses less digits than its factorization.

56358921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3176.

The product of its digits is 64800, while the sum is 39.

The square root of 56358921 is about 7507.2578882039. The cubic root of 56358921 is about 383.4018669317.

The spelling of 56358921 in words is "fifty-six million, three hundred fifty-eight thousand, nine hundred twenty-one".