520716331 has 4 divisors (see below), whose sum is σ = 537513664. Its totient is φ = 503919000.

The previous prime is 520716293. The next prime is 520716347. The reversal of 520716331 is 133617025.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 520716331 - 2²⁷ = 386498603 is a prime.

It is a super-2 number, since 2×520716331² = 542290994740203122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 520716331.

It is not an unprimeable number, because it can be changed into a prime (520716731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8398620 + ... + 8398681.

It is an arithmetic number, because the mean of its divisors is an integer number (134378416).

Almost surely, 2^520716331 is an apocalyptic number.

520716331 is a deficient number, since it is larger than the sum of its proper divisors (16797333).

520716331 is a wasteful number, since it uses less digits than its factorization.

520716331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16797332.

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

The square root of 520716331 is about 22819.2096927128. The cubic root of 520716331 is about 804.5142349203.

The spelling of 520716331 in words is "five hundred twenty million, seven hundred sixteen thousand, three hundred thirty-one".