22099172 has 6 divisors (see below), whose sum is σ = 38673558. Its totient is φ = 11049584.

The previous prime is 22099171. The next prime is 22099177. The reversal of 22099172 is 27199022.

It can be written as a sum of positive squares in only one way, i.e., 22033636 + 65536 = 4694^2 + 256^2 .

It is not an unprimeable number, because it can be changed into a prime (22099171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2762393 + ... + 2762400.

It is an arithmetic number, because the mean of its divisors is an integer number (6445593).

Almost surely, 2^22099172 is an apocalyptic number.

It is an amenable number.

22099172 is a deficient number, since it is larger than the sum of its proper divisors (16574386).

22099172 is a wasteful number, since it uses less digits than its factorization.

22099172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5524797 (or 5524795 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 22099172 is about 4700.9756434170. The cubic root of 22099172 is about 280.6243381218.

The spelling of 22099172 in words is "twenty-two million, ninety-nine thousand, one hundred seventy-two".