520131115431 has 12 divisors (see below), whose sum is σ = 751359448840. Its totient is φ = 346726869840.

The previous prime is 520131115421. The next prime is 520131115451. The reversal of 520131115431 is 134511131025.

520131115431 is a `hidden beast` number, since 5 + 2 + 0 + 1 + 3 + 111 + 543 + 1 = 666.

It is not a de Polignac number, because 520131115431 - 2⁶ = 520131115367 is a prime.

It is a super-2 number, since 2×520131115431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520131115395 and 520131115404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520131115421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2145841 + ... + 2375898.

Almost surely, 2^520131115431 is an apocalyptic number.

520131115431 is a deficient number, since it is larger than the sum of its proper divisors (231228333409).

520131115431 is a wasteful number, since it uses less digits than its factorization.

520131115431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4534526 (or 4534523 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 520131115431 its reverse (134511131025), we get a palindrome (654642246456).

The spelling of 520131115431 in words is "five hundred twenty billion, one hundred thirty-one million, one hundred fifteen thousand, four hundred thirty-one".