22431244 has 12 divisors (see below), whose sum is σ = 42823368. Its totient is φ = 10196000.

The previous prime is 22431209. The next prime is 22431263. The reversal of 22431244 is 44213422.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254857 + ... + 254944.

It is an arithmetic number, because the mean of its divisors is an integer number (3568614).

Almost surely, 2^22431244 is an apocalyptic number.

It is an amenable number.

22431244 is a deficient number, since it is larger than the sum of its proper divisors (20392124).

22431244 is a wasteful number, since it uses less digits than its factorization.

22431244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509816 (or 509814 counting only the distinct ones).

The product of its digits is 1536, while the sum is 22.

The square root of 22431244 is about 4736.1634262344. The cubic root of 22431244 is about 282.0229513704.

Adding to 22431244 its reverse (44213422), we get a palindrome (66644666).

The spelling of 22431244 in words is "twenty-two million, four hundred thirty-one thousand, two hundred forty-four".