220222164 has 12 divisors (see below), whose sum is σ = 513851744. Its totient is φ = 73407384.

The previous prime is 220222151. The next prime is 220222169. The reversal of 220222164 is 461222022.

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 220222164.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220222169) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9175912 + ... + 9175935.

Almost surely, 2^220222164 is an apocalyptic number.

It is an amenable number.

220222164 is an abundant number, since it is smaller than the sum of its proper divisors (293629580).

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

220222164 is a wasteful number, since it uses less digits than its factorization.

220222164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18351854 (or 18351852 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 220222164 is about 14839.8842313544. The cubic root of 220222164 is about 603.8842116831.

Adding to 220222164 its reverse (461222022), we get a palindrome (681444186).

The spelling of 220222164 in words is "two hundred twenty million, two hundred twenty-two thousand, one hundred sixty-four".