56252721 has 16 divisors (see below), whose sum is σ = 88675200. Its totient is φ = 31035648.

The previous prime is 56252701. The next prime is 56252737. The reversal of 56252721 is 12725265.

56252721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56252721 - 2⁷ = 56252593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56252701) 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 15 ways as a sum of consecutive naturals, for example, 45576 + ... + 46793.

It is an arithmetic number, because the mean of its divisors is an integer number (5542200).

Almost surely, 2^56252721 is an apocalyptic number.

It is an amenable number.

56252721 is a deficient number, since it is larger than the sum of its proper divisors (32422479).

56252721 is a wasteful number, since it uses less digits than its factorization.

56252721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92408.

The product of its digits is 8400, while the sum is 30.

The square root of 56252721 is about 7500.1813978063. The cubic root of 56252721 is about 383.1608942541.

Adding to 56252721 its reverse (12725265), we get a palindrome (68977986).

The spelling of 56252721 in words is "fifty-six million, two hundred fifty-two thousand, seven hundred twenty-one".