520505520 has 160 divisors (see below), whose sum is σ = 1652840640. Its totient is φ = 135475200.

The previous prime is 520505443. The next prime is 520505539. The reversal of 520505520 is 25505025.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2642062 + ... + 2642258.

It is an arithmetic number, because the mean of its divisors is an integer number (10330254).

Almost surely, 2^520505520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520505520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (826420320).

520505520 is an abundant number, since it is smaller than the sum of its proper divisors (1132335120).

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

520505520 is a wasteful number, since it uses less digits than its factorization.

520505520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 24.

The square root of 520505520 is about 22814.5900686381. The cubic root of 520505520 is about 804.4056515881.

The spelling of 520505520 in words is "five hundred twenty million, five hundred five thousand, five hundred twenty".