22166220 has 48 divisors (see below), whose sum is σ = 62270208. Its totient is φ = 5891520.

The previous prime is 22166201. The next prime is 22166233. The reversal of 22166220 is 2266122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33937 + ... + 34583.

It is an arithmetic number, because the mean of its divisors is an integer number (1297296).

Almost surely, 2^22166220 is an apocalyptic number.

22166220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22166220 is an abundant number, since it is smaller than the sum of its proper divisors (40103988).

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

22166220 is a wasteful number, since it uses less digits than its factorization.

22166220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230 (or 1228 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 22166220 is about 4708.1015282171. The cubic root of 22166220 is about 280.9078525802.

The spelling of 22166220 in words is "twenty-two million, one hundred sixty-six thousand, two hundred twenty".