222118656 has 72 divisors (see below), whose sum is σ = 611605680. Its totient is φ = 71479296.

The previous prime is 222118643. The next prime is 222118681. The reversal of 222118656 is 656811222.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 17286 + ... + 27258.

Almost surely, 2^222118656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222118656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305802840).

222118656 is an abundant number, since it is smaller than the sum of its proper divisors (389487024).

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

222118656 is an equidigital number, since it uses as much as digits as its factorization.

222118656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10021 (or 10007 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 222118656 is about 14903.6457284787. The cubic root of 222118656 is about 605.6127534983.

Adding to 222118656 its reverse (656811222), we get a palindrome (878929878).

The spelling of 222118656 in words is "two hundred twenty-two million, one hundred eighteen thousand, six hundred fifty-six".