520263531 has 6 divisors (see below), whose sum is σ = 751491780. Its totient is φ = 346842348.

The previous prime is 520263467. The next prime is 520263551. The reversal of 520263531 is 135362025.

520263531 is a `hidden beast` number, since 5 + 20 + 2 + 635 + 3 + 1 = 666.

It is not a de Polignac number, because 520263531 - 2⁶ = 520263467 is a prime.

It is a super-2 number, since 2×520263531² = 541348283377175922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 520263495 and 520263504.

It is not an unprimeable number, because it can be changed into a prime (520263551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28903521 + ... + 28903538.

It is an arithmetic number, because the mean of its divisors is an integer number (125248630).

Almost surely, 2^520263531 is an apocalyptic number.

520263531 is a deficient number, since it is larger than the sum of its proper divisors (231228249).

520263531 is a wasteful number, since it uses less digits than its factorization.

520263531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57807065 (or 57807062 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 520263531 is about 22809.2860694937. The cubic root of 520263531 is about 804.2809731196.

The spelling of 520263531 in words is "five hundred twenty million, two hundred sixty-three thousand, five hundred thirty-one".