22117972 has 12 divisors (see below), whose sum is σ = 38878560. Its totient is φ = 11009816.

The previous prime is 22117961. The next prime is 22118011. The reversal of 22117972 is 27971122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11272 + ... + 13087.

It is an arithmetic number, because the mean of its divisors is an integer number (3239880).

Almost surely, 2^22117972 is an apocalyptic number.

It is an amenable number.

22117972 is a deficient number, since it is larger than the sum of its proper divisors (16760588).

22117972 is a wasteful number, since it uses less digits than its factorization.

22117972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24590 (or 24588 counting only the distinct ones).

The product of its digits is 3528, while the sum is 31.

The square root of 22117972 is about 4702.9748032495. The cubic root of 22117972 is about 280.7038922671.

The spelling of 22117972 in words is "twenty-two million, one hundred seventeen thousand, nine hundred seventy-two".