56318013 has 6 divisors (see below), whose sum is σ = 81348254. Its totient is φ = 37545336.

The previous prime is 56317999. The next prime is 56318021. The reversal of 56318013 is 31081365.

It can be written as a sum of positive squares in only one way, i.e., 52229529 + 4088484 = 7227^2 + 2022^2 .

It is not a de Polignac number, because 56318013 - 2⁶ = 56317949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56318063) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3128770 + ... + 3128787.

Almost surely, 2^56318013 is an apocalyptic number.

It is an amenable number.

56318013 is a deficient number, since it is larger than the sum of its proper divisors (25030241).

56318013 is a wasteful number, since it uses less digits than its factorization.

56318013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6257563 (or 6257560 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 56318013 is about 7504.5328302300. The cubic root of 56318013 is about 383.3090806752.

Adding to 56318013 its reverse (31081365), we get a palindrome (87399378).

The spelling of 56318013 in words is "fifty-six million, three hundred eighteen thousand, thirteen".