220031110164 has 12 divisors (see below), whose sum is σ = 513405923744. Its totient is φ = 73343703384.

The previous prime is 220031110151. The next prime is 220031110171. The reversal of 220031110164 is 461011130022.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 220031110164.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9167962912 + ... + 9167962935.

Almost surely, 2^220031110164 is an apocalyptic number.

It is an amenable number.

220031110164 is an abundant number, since it is smaller than the sum of its proper divisors (293374813580).

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

220031110164 is a wasteful number, since it uses less digits than its factorization.

220031110164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18335925854 (or 18335925852 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 220031110164 its reverse (461011130022), we get a palindrome (681042240186).

The spelling of 220031110164 in words is "two hundred twenty billion, thirty-one million, one hundred ten thousand, one hundred sixty-four".