22212906 has 32 divisors (see below), whose sum is σ = 45586368. Its totient is φ = 7213440.

The previous prime is 22212901. The next prime is 22212929. The reversal of 22212906 is 60921222.

It is not an unprimeable number, because it can be changed into a prime (22212901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49921 + ... + 50363.

It is an arithmetic number, because the mean of its divisors is an integer number (1424574).

Almost surely, 2^22212906 is an apocalyptic number.

22212906 is an abundant number, since it is smaller than the sum of its proper divisors (23373462).

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

22212906 is a wasteful number, since it uses less digits than its factorization.

22212906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 22212906 is about 4713.0569697384. The cubic root of 22212906 is about 281.1049282450.

The spelling of 22212906 in words is "twenty-two million, two hundred twelve thousand, nine hundred six".