22143992 has 16 divisors (see below), whose sum is σ = 44714040. Its totient is φ = 10220256.

The previous prime is 22143991. The next prime is 22143997. The reversal of 22143992 is 29934122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22143991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106358 + ... + 106565.

Almost surely, 2^22143992 is an apocalyptic number.

It is an amenable number.

22143992 is an abundant number, since it is smaller than the sum of its proper divisors (22570048).

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

22143992 is a wasteful number, since it uses less digits than its factorization.

22143992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212942 (or 212938 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The square root of 22143992 is about 4705.7403243273. The cubic root of 22143992 is about 280.8139242506.

The spelling of 22143992 in words is "twenty-two million, one hundred forty-three thousand, nine hundred ninety-two".