22122912 has 72 divisors (see below), whose sum is σ = 67568256. Its totient is φ = 6319488.

The previous prime is 22122901. The next prime is 22122917. The reversal of 22122912 is 21922122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (22122917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2353 + ... + 7055.

It is an arithmetic number, because the mean of its divisors is an integer number (938448).

Almost surely, 2^22122912 is an apocalyptic number.

It is a pronic number, being equal to 4703×4704.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22122912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33784128).

22122912 is an abundant number, since it is smaller than the sum of its proper divisors (45445344).

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

22122912 is a wasteful number, since it uses less digits than its factorization.

22122912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4730 (or 4715 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

The square root of 22122912 is about 4703.4999734240. The cubic root of 22122912 is about 280.7247889087.

The spelling of 22122912 in words is "twenty-two million, one hundred twenty-two thousand, nine hundred twelve".