222266218 has 16 divisors (see below), whose sum is σ = 362269440. Its totient is φ = 101887200.

The previous prime is 222266203. The next prime is 222266251. The reversal of 222266218 is 812662222.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a self number, because there is not a number n which added to its sum of digits gives 222266218.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93163 + ... + 95518.

It is an arithmetic number, because the mean of its divisors is an integer number (22641840).

Almost surely, 2^222266218 is an apocalyptic number.

222266218 is a deficient number, since it is larger than the sum of its proper divisors (140003222).

222266218 is a wasteful number, since it uses less digits than its factorization.

222266218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188733.

The product of its digits is 9216, while the sum is 31.

The square root of 222266218 is about 14908.5954402150. The cubic root of 222266218 is about 605.7468344566.

The spelling of 222266218 in words is "two hundred twenty-two million, two hundred sixty-six thousand, two hundred eighteen".