520631881 has 8 divisors (see below), whose sum is σ = 649099584. Its totient is φ = 405687120.

The previous prime is 520631873. The next prime is 520631941. The reversal of 520631881 is 188136025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 520631881 - 2³ = 520631873 is a prime.

It is a super-2 number, since 2×520631881² = 542115111027196322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (520631821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3380650 + ... + 3380803.

It is an arithmetic number, because the mean of its divisors is an integer number (81137448).

Almost surely, 2^520631881 is an apocalyptic number.

It is an amenable number.

520631881 is a deficient number, since it is larger than the sum of its proper divisors (128467703).

520631881 is a wasteful number, since it uses less digits than its factorization.

520631881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6761471.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 520631881 is about 22817.3592030279. The cubic root of 520631881 is about 804.4707404132.

The spelling of 520631881 in words is "five hundred twenty million, six hundred thirty-one thousand, eight hundred eighty-one".