520215320 has 32 divisors (see below), whose sum is σ = 1189678320. Its totient is φ = 204673920.

The previous prime is 520215313. The next prime is 520215337. The reversal of 520215320 is 23512025.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 520215292 and 520215301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104162 + ... + 109041.

Almost surely, 2^520215320 is an apocalyptic number.

It is an amenable number.

520215320 is an abundant number, since it is smaller than the sum of its proper divisors (669463000).

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

520215320 is a wasteful number, since it uses less digits than its factorization.

520215320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213275 (or 213271 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 520215320 is about 22808.2292166665. The cubic root of 520215320 is about 804.2561290515.

Adding to 520215320 its reverse (23512025), we get a palindrome (543727345).

The spelling of 520215320 in words is "five hundred twenty million, two hundred fifteen thousand, three hundred twenty".