222211988 has 12 divisors (see below), whose sum is σ = 390123552. Its totient is φ = 110748120.

The previous prime is 222211943. The next prime is 222212009. The reversal of 222211988 is 889112222.

It is a super-2 number, since 2×222211988² = 98756335221824288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88070 + ... + 90557.

It is an arithmetic number, because the mean of its divisors is an integer number (32510296).

Almost surely, 2^222211988 is an apocalyptic number.

It is an amenable number.

222211988 is a deficient number, since it is larger than the sum of its proper divisors (167911564).

222211988 is a wasteful number, since it uses less digits than its factorization.

222211988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178942 (or 178940 counting only the distinct ones).

The product of its digits is 9216, while the sum is 35.

The square root of 222211988 is about 14906.7765797975. The cubic root of 222211988 is about 605.6975657267.

The spelling of 222211988 in words is "two hundred twenty-two million, two hundred eleven thousand, nine hundred eighty-eight".