56624421 has 32 divisors (see below), whose sum is σ = 89605120. Its totient is φ = 31135104.

The previous prime is 56624419. The next prime is 56624423. The reversal of 56624421 is 12442665.

It is an interprime number because it is at equal distance from previous prime (56624419) and next prime (56624423).

It is not a de Polignac number, because 56624421 - 2¹ = 56624419 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56624423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65490 + ... + 66348.

It is an arithmetic number, because the mean of its divisors is an integer number (2800160).

Almost surely, 2^56624421 is an apocalyptic number.

It is an amenable number.

56624421 is a deficient number, since it is larger than the sum of its proper divisors (32980699).

56624421 is a wasteful number, since it uses less digits than its factorization.

56624421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985.

The product of its digits is 11520, while the sum is 30.

The square root of 56624421 is about 7524.9199995747. The cubic root of 56624421 is about 384.0029771362.

The spelling of 56624421 in words is "fifty-six million, six hundred twenty-four thousand, four hundred twenty-one".