222221812 has 24 divisors (see below), whose sum is σ = 392616000. Its totient is φ = 110051136.

The previous prime is 222221801. The next prime is 222221819. The reversal of 222221812 is 218122222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370689 + ... + 371287.

It is an arithmetic number, because the mean of its divisors is an integer number (16359000).

Almost surely, 2^222221812 is an apocalyptic number.

It is an amenable number.

222221812 is a deficient number, since it is larger than the sum of its proper divisors (170394188).

222221812 is a wasteful number, since it uses less digits than its factorization.

222221812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335 (or 1333 counting only the distinct ones).

The product of its digits is 512, while the sum is 22.

The square root of 222221812 is about 14907.1060907206. The cubic root of 222221812 is about 605.7064915655.

The spelling of 222221812 in words is "two hundred twenty-two million, two hundred twenty-one thousand, eight hundred twelve".