520170220 has 24 divisors (see below), whose sum is σ = 1149850800. Its totient is φ = 197116992.

The previous prime is 520170193. The next prime is 520170221. The reversal of 520170220 is 22071025.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (520170221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684055 + ... + 684814.

It is an arithmetic number, because the mean of its divisors is an integer number (47910450).

Almost surely, 2^520170220 is an apocalyptic number.

It is an amenable number.

520170220 is an abundant number, since it is smaller than the sum of its proper divisors (629680580).

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

520170220 is a wasteful number, since it uses less digits than its factorization.

520170220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368897 (or 1368895 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 520170220 is about 22807.2405169937. The cubic root of 520170220 is about 804.2328867528.

The spelling of 520170220 in words is "five hundred twenty million, one hundred seventy thousand, two hundred twenty".