56564751 has 32 divisors (see below), whose sum is σ = 81423360. Its totient is φ = 34848000.

The previous prime is 56564743. The next prime is 56564759. The reversal of 56564751 is 15746565.

It is an interprime number because it is at equal distance from previous prime (56564743) and next prime (56564759).

It is not a de Polignac number, because 56564751 - 2³ = 56564743 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56564759) 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, 374526 + ... + 374676.

It is an arithmetic number, because the mean of its divisors is an integer number (2544480).

Almost surely, 2^56564751 is an apocalyptic number.

56564751 is the 6141-st pentagonal number.

56564751 is a deficient number, since it is larger than the sum of its proper divisors (24858609).

56564751 is a wasteful number, since it uses less digits than its factorization.

56564751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327.

The product of its digits is 126000, while the sum is 39.

The square root of 56564751 is about 7520.9541283005. The cubic root of 56564751 is about 383.8680441245.

The spelling of 56564751 in words is "fifty-six million, five hundred sixty-four thousand, seven hundred fifty-one".