56633921 has 2 divisors, whose sum is σ = 56633922. Its totient is φ = 56633920.

The previous prime is 56633887. The next prime is 56633947. The reversal of 56633921 is 12933665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56550400 + 83521 = 7520^2 + 289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56633921 is a prime.

It is not a weakly prime, because it can be changed into another prime (56632921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28316960 + 28316961.

It is an arithmetic number, because the mean of its divisors is an integer number (28316961).

Almost surely, 2^56633921 is an apocalyptic number.

It is an amenable number.

56633921 is a deficient number, since it is larger than the sum of its proper divisors (1).

56633921 is an equidigital number, since it uses as much as digits as its factorization.

56633921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 35.

The square root of 56633921 is about 7525.5512090477. The cubic root of 56633921 is about 384.0244509351.

The spelling of 56633921 in words is "fifty-six million, six hundred thirty-three thousand, nine hundred twenty-one".