520716731 has 2 divisors, whose sum is σ = 520716732. Its totient is φ = 520716730.

The previous prime is 520716727. The next prime is 520716737. The reversal of 520716731 is 137617025.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 520716731 - 2² = 520716727 is a prime.

It is a super-2 number, since 2×520716731² = 542291827886652722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (520716737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260358365 + 260358366.

It is an arithmetic number, because the mean of its divisors is an integer number (260358366).

Almost surely, 2^520716731 is an apocalyptic number.

520716731 is a deficient number, since it is larger than the sum of its proper divisors (1).

520716731 is an equidigital number, since it uses as much as digits as its factorization.

520716731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 520716731 is about 22819.2184572566. The cubic root of 520716731 is about 804.5144409221.

The spelling of 520716731 in words is "five hundred twenty million, seven hundred sixteen thousand, seven hundred thirty-one".