23221872 has 30 divisors (see below), whose sum is σ = 64989392. Its totient is φ = 7740576.

The previous prime is 23221853. The next prime is 23221909. The reversal of 23221872 is 27812232.

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 (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 80488 + ... + 80775.

Almost surely, 2^23221872 is an apocalyptic number.

It is an amenable number.

23221872 is an abundant number, since it is smaller than the sum of its proper divisors (41767520).

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

23221872 is a wasteful number, since it uses less digits than its factorization.

23221872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161277 (or 161268 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 23221872 is about 4818.9077600635. The cubic root of 23221872 is about 285.2982289088.

The spelling of 23221872 in words is "twenty-three million, two hundred twenty-one thousand, eight hundred seventy-two".