501220164 has 24 divisors (see below), whose sum is σ = 1188687808. Its totient is φ = 164334240.

The previous prime is 501220147. The next prime is 501220193. The reversal of 501220164 is 461022105.

It is a self number, because there is not a number n which added to its sum of digits gives 501220164.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341632 + ... + 343095.

Almost surely, 2^501220164 is an apocalyptic number.

It is an amenable number.

501220164 is an abundant number, since it is smaller than the sum of its proper divisors (687467644).

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

501220164 is a wasteful number, since it uses less digits than its factorization.

501220164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684795 (or 684793 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 501220164 is about 22387.9468464618. The cubic root of 501220164 is about 794.3456313845.

Adding to 501220164 its reverse (461022105), we get a palindrome (962242269).

The spelling of 501220164 in words is "five hundred one million, two hundred twenty thousand, one hundred sixty-four".