56264021 has 16 divisors (see below), whose sum is σ = 63317376. Its totient is φ = 49560000.

The previous prime is 56264011. The next prime is 56264051. The reversal of 56264021 is 12046265.

56264021 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 a de Polignac number, because none of the positive numbers 2^k-56264021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56264011) 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, 47051 + ... + 48231.

It is an arithmetic number, because the mean of its divisors is an integer number (3957336).

Almost surely, 2^56264021 is an apocalyptic number.

56264021 is the 4331-st octagonal number.

It is an amenable number.

56264021 is a deficient number, since it is larger than the sum of its proper divisors (7053355).

56264021 is a wasteful number, since it uses less digits than its factorization.

56264021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 56264021 is about 7500.9346750922. The cubic root of 56264021 is about 383.1865488840.

The spelling of 56264021 in words is "fifty-six million, two hundred sixty-four thousand, twenty-one".