56317013 has 2 divisors, whose sum is σ = 56317014. Its totient is φ = 56317012.

The previous prime is 56317003. The next prime is 56317021. The reversal of 56317013 is 31071365.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49463089 + 6853924 = 7033^2 + 2618^2 .

It is a cyclic number.

It is not a de Polignac number, because 56317013 - 2¹⁶ = 56251477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56317003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28158506 + 28158507.

It is an arithmetic number, because the mean of its divisors is an integer number (28158507).

Almost surely, 2^56317013 is an apocalyptic number.

It is an amenable number.

56317013 is a deficient number, since it is larger than the sum of its proper divisors (1).

56317013 is an equidigital number, since it uses as much as digits as its factorization.

56317013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 56317013 is about 7504.4662035351. The cubic root of 56317013 is about 383.3068119437.

Adding to 56317013 its reverse (31071365), we get a palindrome (87388378).

It can be divided in two parts, 563 and 17013, that added together give a cube (17576 = 26³).

The spelling of 56317013 in words is "fifty-six million, three hundred seventeen thousand, thirteen".