56531013 has 32 divisors (see below), whose sum is σ = 94943232. Its totient is φ = 29064000.

The previous prime is 56531009. The next prime is 56531017. The reversal of 56531013 is 31013565.

56531013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (56531009) and next prime (56531017).

It is not a de Polignac number, because 56531013 - 2² = 56531009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56531017) 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 31 ways as a sum of consecutive naturals, for example, 22120 + ... + 24542.

It is an arithmetic number, because the mean of its divisors is an integer number (2966976).

Almost surely, 2^56531013 is an apocalyptic number.

It is an amenable number.

56531013 is a deficient number, since it is larger than the sum of its proper divisors (38412219).

56531013 is a wasteful number, since it uses less digits than its factorization.

56531013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2545.

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 56531013 is about 7518.7108602473. The cubic root of 56531013 is about 383.7917096844.

Adding to 56531013 its reverse (31013565), we get a palindrome (87544578).

It can be divided in two parts, 5653 and 1013, that added together give a palindrome (6666).

The spelling of 56531013 in words is "fifty-six million, five hundred thirty-one thousand, thirteen".