56165921 has 8 divisors (see below), whose sum is σ = 64303680. Its totient is φ = 48056688.

The previous prime is 56165873. The next prime is 56165927. The reversal of 56165921 is 12956165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56165921 is a prime.

It is a super-2 number, since 2×56165921² = 6309221363556482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56165927) 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, 2726 + ... + 10943.

It is an arithmetic number, because the mean of its divisors is an integer number (8037960).

Almost surely, 2^56165921 is an apocalyptic number.

It is an amenable number.

56165921 is a deficient number, since it is larger than the sum of its proper divisors (8137759).

56165921 is a wasteful number, since it uses less digits than its factorization.

56165921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14263.

The product of its digits is 16200, while the sum is 35.

The square root of 56165921 is about 7494.3926371655. The cubic root of 56165921 is about 382.9637157236.

The spelling of 56165921 in words is "fifty-six million, one hundred sixty-five thousand, nine hundred twenty-one".