23221887 has 16 divisors (see below), whose sum is σ = 33435360. Its totient is φ = 14251392.

The previous prime is 23221853. The next prime is 23221909. The reversal of 23221887 is 78812232.

It is not a de Polignac number, because 23221887 - 2⁸ = 23221631 is a prime.

It is a super-3 number, since 3×23221887³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23221817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21189 + ... + 22257.

It is an arithmetic number, because the mean of its divisors is an integer number (2089710).

Almost surely, 2^23221887 is an apocalyptic number.

23221887 is a deficient number, since it is larger than the sum of its proper divisors (10213473).

23221887 is a wasteful number, since it uses less digits than its factorization.

23221887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642.

The product of its digits is 10752, while the sum is 33.

The square root of 23221887 is about 4818.9093164325. The cubic root of 23221887 is about 285.2982903376.

The spelling of 23221887 in words is "twenty-three million, two hundred twenty-one thousand, eight hundred eighty-seven".