520165031 has 12 divisors (see below), whose sum is σ = 554699880. Its totient is φ = 487674240.

The previous prime is 520165013. The next prime is 520165057. The reversal of 520165031 is 130561025.

It is a de Polignac number, because none of the positive numbers 2^k-520165031 is a prime.

It is a super-2 number, since 2×520165031² = 541143318950461922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520164988 and 520165006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520165081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74396 + ... + 81086.

It is an arithmetic number, because the mean of its divisors is an integer number (46224990).

Almost surely, 2^520165031 is an apocalyptic number.

520165031 is a deficient number, since it is larger than the sum of its proper divisors (34534849).

520165031 is a wasteful number, since it uses less digits than its factorization.

520165031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6994 (or 6977 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 520165031 is about 22807.1267589760. The cubic root of 520165031 is about 804.2302125139.

The spelling of 520165031 in words is "five hundred twenty million, one hundred sixty-five thousand, thirty-one".