56356931 has 2 divisors, whose sum is σ = 56356932. Its totient is φ = 56356930.

The previous prime is 56356873. The next prime is 56356933. The reversal of 56356931 is 13965365.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56356931 is a prime.

It is a super-2 number, since 2×56356931² = 6352207343477522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 56356933, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56356933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28178465 + 28178466.

It is an arithmetic number, because the mean of its divisors is an integer number (28178466).

Almost surely, 2^56356931 is an apocalyptic number.

56356931 is a deficient number, since it is larger than the sum of its proper divisors (1).

56356931 is an equidigital number, since it uses as much as digits as its factorization.

56356931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72900, while the sum is 38.

The square root of 56356931 is about 7507.1253486271. The cubic root of 56356931 is about 383.3973543145.

The spelling of 56356931 in words is "fifty-six million, three hundred fifty-six thousand, nine hundred thirty-one".