520431020 has 12 divisors (see below), whose sum is σ = 1092905184. Its totient is φ = 208172400.

The previous prime is 520431019. The next prime is 520431029. The reversal of 520431020 is 20134025.

It is a self number, because there is not a number n which added to its sum of digits gives 520431020.

It is not an unprimeable number, because it can be changed into a prime (520431029) 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, 13010756 + ... + 13010795.

It is an arithmetic number, because the mean of its divisors is an integer number (91075432).

Almost surely, 2^520431020 is an apocalyptic number.

It is an amenable number.

520431020 is an abundant number, since it is smaller than the sum of its proper divisors (572474164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520431020 is a wasteful number, since it uses less digits than its factorization.

520431020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26021560 (or 26021558 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 520431020 is about 22812.9572830880. The cubic root of 520431020 is about 804.3672715401.

Adding to 520431020 its reverse (20134025), we get a palindrome (540565045).

The spelling of 520431020 in words is "five hundred twenty million, four hundred thirty-one thousand, twenty".