56207921 has 32 divisors (see below), whose sum is σ = 73032960. Its totient is φ = 41990400.

The previous prime is 56207903. The next prime is 56207927. The reversal of 56207921 is 12970265.

56207921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 56207921 - 2¹⁰ = 56206897 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56207927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 310451 + ... + 310631.

It is an arithmetic number, because the mean of its divisors is an integer number (2282280).

Almost surely, 2^56207921 is an apocalyptic number.

It is an amenable number.

56207921 is a deficient number, since it is larger than the sum of its proper divisors (16825039).

56207921 is a wasteful number, since it uses less digits than its factorization.

56207921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 56207921 is about 7497.1942085023. The cubic root of 56207921 is about 383.0591500380.

The spelling of 56207921 in words is "fifty-six million, two hundred seven thousand, nine hundred twenty-one".