520345131 has 16 divisors (see below), whose sum is σ = 720576000. Its totient is φ = 333756128.

The previous prime is 520345127. The next prime is 520345141. The reversal of 520345131 is 131543025.

It is a cyclic number.

It is not a de Polignac number, because 520345131 - 2² = 520345127 is a prime.

It is a super-2 number, since 2×520345131² = 541518110710814322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (520345141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22956 + ... + 39593.

It is an arithmetic number, because the mean of its divisors is an integer number (45036000).

Almost surely, 2^520345131 is an apocalyptic number.

520345131 is a deficient number, since it is larger than the sum of its proper divisors (200230869).

520345131 is a wasteful number, since it uses less digits than its factorization.

520345131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62658.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 520345131 is about 22811.0747445183. The cubic root of 520345131 is about 804.3230196932.

Adding to 520345131 its reverse (131543025), we get a palindrome (651888156).

The spelling of 520345131 in words is "five hundred twenty million, three hundred forty-five thousand, one hundred thirty-one".