23221982 has 24 divisors (see below), whose sum is σ = 41922360. Its totient is φ = 9607920.

The previous prime is 23221981. The next prime is 23221993. The reversal of 23221982 is 28912232.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23221981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1244 + ... + 6927.

It is an arithmetic number, because the mean of its divisors is an integer number (1746765).

Almost surely, 2^23221982 is an apocalyptic number.

23221982 is a deficient number, since it is larger than the sum of its proper divisors (18700378).

23221982 is a wasteful number, since it uses less digits than its factorization.

23221982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8216 (or 8209 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 23221982 is about 4818.9191734247. The cubic root of 23221982 is about 285.2986793858.

The spelling of 23221982 in words is "twenty-three million, two hundred twenty-one thousand, nine hundred eighty-two".