56312731 has 2 divisors, whose sum is σ = 56312732. Its totient is φ = 56312730.

The previous prime is 56312719. The next prime is 56312741. The reversal of 56312731 is 13721365.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56312731 - 2¹³ = 56304539 is a prime.

It is a super-2 number, since 2×56312731² = 6342247345356722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56312731.

It is not a weakly prime, because it can be changed into another prime (56312741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28156365 + 28156366.

It is an arithmetic number, because the mean of its divisors is an integer number (28156366).

Almost surely, 2^56312731 is an apocalyptic number.

56312731 is a deficient number, since it is larger than the sum of its proper divisors (1).

56312731 is an equidigital number, since it uses as much as digits as its factorization.

56312731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 28.

The square root of 56312731 is about 7504.1809013376. The cubic root of 56312731 is about 383.2970969318.

The spelling of 56312731 in words is "fifty-six million, three hundred twelve thousand, seven hundred thirty-one".