520131431 has 4 divisors (see below), whose sum is σ = 520250952. Its totient is φ = 520011912.

The previous prime is 520131427. The next prime is 520131449. The reversal of 520131431 is 134131025.

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 520131431 - 2² = 520131427 is a prime.

It is a super-2 number, since 2×520131431² = 541073411028215522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520131461) 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, 52976 + ... + 62021.

It is an arithmetic number, because the mean of its divisors is an integer number (130062738).

Almost surely, 2^520131431 is an apocalyptic number.

520131431 is a deficient number, since it is larger than the sum of its proper divisors (119521).

520131431 is a wasteful number, since it uses less digits than its factorization.

520131431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119520.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 520131431 is about 22806.3901352231. The cubic root of 520131431 is about 804.2128957552.

Adding to 520131431 its reverse (134131025), we get a palindrome (654262456).

The spelling of 520131431 in words is "five hundred twenty million, one hundred thirty-one thousand, four hundred thirty-one".