23221590 has 48 divisors (see below), whose sum is σ = 64834992. Its totient is φ = 5307456.

The previous prime is 23221537. The next prime is 23221631. The reversal of 23221590 is 9512232.

It is a self number, because there is not a number n which added to its sum of digits gives 23221590.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6429 + ... + 9368.

It is an arithmetic number, because the mean of its divisors is an integer number (1350729).

Almost surely, 2^23221590 is an apocalyptic number.

23221590 is an abundant number, since it is smaller than the sum of its proper divisors (41613402).

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

23221590 is a wasteful number, since it uses less digits than its factorization.

23221590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15821 (or 15814 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 23221590 is about 4818.8785002322. The cubic root of 23221590 is about 285.2970740432.

The spelling of 23221590 in words is "twenty-three million, two hundred twenty-one thousand, five hundred ninety".