22191168 has 56 divisors (see below), whose sum is σ = 60167520. Its totient is φ = 7214080.

The previous prime is 22191163. The next prime is 22191187. The reversal of 22191168 is 86119122.

It is a happy number.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (22191163) 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, 6463 + ... + 9281.

It is an arithmetic number, because the mean of its divisors is an integer number (1074420).

Almost surely, 2^22191168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22191168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30083760).

22191168 is an abundant number, since it is smaller than the sum of its proper divisors (37976352).

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

22191168 is a wasteful number, since it uses less digits than its factorization.

22191168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2875 (or 2865 counting only the distinct ones).

The product of its digits is 1728, while the sum is 30.

The square root of 22191168 is about 4710.7502587168. The cubic root of 22191168 is about 281.0131999895.

The spelling of 22191168 in words is "twenty-two million, one hundred ninety-one thousand, one hundred sixty-eight".