22157992 has 16 divisors (see below), whose sum is σ = 41664960. Its totient is φ = 11047344.

The previous prime is 22157959. The next prime is 22158007. The reversal of 22157992 is 29975122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 838 + ... + 6709.

It is an arithmetic number, because the mean of its divisors is an integer number (2604060).

Almost surely, 2^22157992 is an apocalyptic number.

It is an amenable number.

22157992 is a deficient number, since it is larger than the sum of its proper divisors (19506968).

22157992 is a wasteful number, since it uses less digits than its factorization.

22157992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7920 (or 7916 counting only the distinct ones).

The product of its digits is 22680, while the sum is 37.

The square root of 22157992 is about 4707.2276341813. The cubic root of 22157992 is about 280.8730910398.

The spelling of 22157992 in words is "twenty-two million, one hundred fifty-seven thousand, nine hundred ninety-two".