500161220 has 48 divisors (see below), whose sum is σ = 1180327680. Its totient is φ = 176643456.

The previous prime is 500161219. The next prime is 500161229. The reversal of 500161220 is 22161005.

It is a super-2 number, since 2×500161220² = 500322491983776800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (500161229) 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, 35840 + ... + 47799.

It is an arithmetic number, because the mean of its divisors is an integer number (24590160).

Almost surely, 2^500161220 is an apocalyptic number.

It is an amenable number.

500161220 is an abundant number, since it is smaller than the sum of its proper divisors (680166460).

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

500161220 is a wasteful number, since it uses less digits than its factorization.

500161220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83684 (or 83682 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 500161220 is about 22364.2844732399. The cubic root of 500161220 is about 793.7858237495.

The spelling of 500161220 in words is "five hundred million, one hundred sixty-one thousand, two hundred twenty".