22991198 has 4 divisors (see below), whose sum is σ = 34486800. Its totient is φ = 11495598.

The previous prime is 22991173. The next prime is 22991207. The reversal of 22991198 is 89119922.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5747798 + ... + 5747801.

It is an arithmetic number, because the mean of its divisors is an integer number (8621700).

Almost surely, 2^22991198 is an apocalyptic number.

22991198 is a deficient number, since it is larger than the sum of its proper divisors (11495602).

22991198 is a wasteful number, since it uses less digits than its factorization.

22991198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11495601.

The product of its digits is 23328, while the sum is 41.

The square root of 22991198 is about 4794.9137635624. The cubic root of 22991198 is about 284.3504155054.

The spelling of 22991198 in words is "twenty-two million, nine hundred ninety-one thousand, one hundred ninety-eight".