22991199 has 16 divisors (see below), whose sum is σ = 38219520. Its totient is φ = 11943360.

The previous prime is 22991173. The next prime is 22991207. The reversal of 22991199 is 99119922.

It is not a de Polignac number, because 22991199 - 2⁵ = 22991167 is a prime.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 22991199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22991299) 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, 49534 + ... + 49995.

It is an arithmetic number, because the mean of its divisors is an integer number (2388720).

Almost surely, 2^22991199 is an apocalyptic number.

22991199 is a deficient number, since it is larger than the sum of its proper divisors (15228321).

22991199 is a wasteful number, since it uses less digits than its factorization.

22991199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99550.

The product of its digits is 26244, while the sum is 42.

The square root of 22991199 is about 4794.9138678395. The cubic root of 22991199 is about 284.3504196280.

The spelling of 22991199 in words is "twenty-two million, nine hundred ninety-one thousand, one hundred ninety-nine".