222221972 has 24 divisors (see below), whose sum is σ = 445722816. Its totient is φ = 94963968.

The previous prime is 222221971. The next prime is 222222029. The reversal of 222221972 is 279122222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221971) 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, 1358 + ... + 21125.

It is an arithmetic number, because the mean of its divisors is an integer number (18571784).

Almost surely, 2^222221972 is an apocalyptic number.

It is an amenable number.

222221972 is an abundant number, since it is smaller than the sum of its proper divisors (223500844).

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

222221972 is a wasteful number, since it uses less digits than its factorization.

222221972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22847 (or 22845 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 222221972 is about 14907.1114572878. Note that the first 3 decimals coincide. The cubic root of 222221972 is about 605.7066369353.

The spelling of 222221972 in words is "two hundred twenty-two million, two hundred twenty-one thousand, nine hundred seventy-two".