22331998 has 12 divisors (see below), whose sum is σ = 36273528. Its totient is φ = 10306920.

The previous prime is 22331993. The next prime is 22332041. The reversal of 22331998 is 89913322.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22331993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32698 + ... + 33373.

It is an arithmetic number, because the mean of its divisors is an integer number (3022794).

Almost surely, 2^22331998 is an apocalyptic number.

22331998 is a deficient number, since it is larger than the sum of its proper divisors (13941530).

22331998 is a wasteful number, since it uses less digits than its factorization.

22331998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66099 (or 66086 counting only the distinct ones).

The product of its digits is 23328, while the sum is 37.

The square root of 22331998 is about 4725.6743434139. The cubic root of 22331998 is about 281.6064039387.

The spelling of 22331998 in words is "twenty-two million, three hundred thirty-one thousand, nine hundred ninety-eight".