22431224 has 8 divisors (see below), whose sum is σ = 42058560. Its totient is φ = 11215608.

The previous prime is 22431209. The next prime is 22431263. The reversal of 22431224 is 42213422.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 22431196 and 22431205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1401944 + ... + 1401959.

It is an arithmetic number, because the mean of its divisors is an integer number (5257320).

Almost surely, 2^22431224 is an apocalyptic number.

It is an amenable number.

22431224 is a deficient number, since it is larger than the sum of its proper divisors (19627336).

22431224 is a wasteful number, since it uses less digits than its factorization.

22431224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803909 (or 2803905 counting only the distinct ones).

The product of its digits is 768, while the sum is 20.

The square root of 22431224 is about 4736.1613148203. The cubic root of 22431224 is about 282.0228675519.

Adding to 22431224 its reverse (42213422), we get a palindrome (64644646).

The spelling of 22431224 in words is "twenty-two million, four hundred thirty-one thousand, two hundred twenty-four".