520306431 has 16 divisors (see below), whose sum is σ = 731495040. Its totient is φ = 328056480.

The previous prime is 520306411. The next prime is 520306463. The reversal of 520306431 is 134603025.

It is a happy number.

It is not a de Polignac number, because 520306431 - 2⁵ = 520306399 is a prime.

It is a super-2 number, since 2×520306431² = 541437564279915522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520306411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27496 + ... + 42386.

It is an arithmetic number, because the mean of its divisors is an integer number (45718440).

Almost surely, 2^520306431 is an apocalyptic number.

520306431 is a deficient number, since it is larger than the sum of its proper divisors (211188609).

520306431 is a wasteful number, since it uses less digits than its factorization.

520306431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15526.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 520306431 is about 22810.2264565699. The cubic root of 520306431 is about 804.3030790354.

Adding to 520306431 its reverse (134603025), we get a palindrome (654909456).

The spelling of 520306431 in words is "five hundred twenty million, three hundred six thousand, four hundred thirty-one".