56531245 has 4 divisors (see below), whose sum is σ = 67837500. Its totient is φ = 45224992.

The previous prime is 56531219. The next prime is 56531249. The reversal of 56531245 is 54213565.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34880836 + 21650409 = 5906^2 + 4653^2 .

It is a cyclic number.

It is not a de Polignac number, because 56531245 - 2¹¹ = 56529197 is a prime.

It is a super-2 number, since 2×56531245² = 6391563322500050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) 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 (56531249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5653120 + ... + 5653129.

It is an arithmetic number, because the mean of its divisors is an integer number (16959375).

Almost surely, 2^56531245 is an apocalyptic number.

It is an amenable number.

56531245 is a deficient number, since it is larger than the sum of its proper divisors (11306255).

56531245 is a wasteful number, since it uses less digits than its factorization.

56531245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11306254.

The product of its digits is 18000, while the sum is 31.

The square root of 56531245 is about 7518.7262884082. The cubic root of 56531245 is about 383.7922347034.

The spelling of 56531245 in words is "fifty-six million, five hundred thirty-one thousand, two hundred forty-five".