22212210 has 32 divisors (see below), whose sum is σ = 54752832. Its totient is φ = 5762880.

The previous prime is 22212199. The next prime is 22212233. The reversal of 22212210 is 1221222.

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, 8896 + ... + 11115.

It is an arithmetic number, because the mean of its divisors is an integer number (1711026).

Almost surely, 2^22212210 is an apocalyptic number.

22212210 is an abundant number, since it is smaller than the sum of its proper divisors (32540622).

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

22212210 is a wasteful number, since it uses less digits than its factorization.

22212210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20058.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 22212210 is about 4712.9831317330. The cubic root of 22212210 is about 281.1019922481.

Adding to 22212210 its reverse (1221222), we get a palindrome (23433432).

It can be divided in two parts, 22212 and 210, that added together give a palindrome (22422).

The spelling of 22212210 in words is "twenty-two million, two hundred twelve thousand, two hundred ten".