222211998 has 40 divisors (see below), whose sum is σ = 527215392. Its totient is φ = 69712704.

The previous prime is 222211943. The next prime is 222212009. The reversal of 222211998 is 899112222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 37590 + ... + 43097.

Almost surely, 2^222211998 is an apocalyptic number.

222211998 is an abundant number, since it is smaller than the sum of its proper divisors (305003394).

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

222211998 is a wasteful number, since it uses less digits than its factorization.

222211998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80718 (or 80709 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 222211998 is about 14906.7769152154. The cubic root of 222211998 is about 605.6975748125.

The spelling of 222211998 in words is "two hundred twenty-two million, two hundred eleven thousand, nine hundred ninety-eight".