22431424 has 28 divisors (see below), whose sum is σ = 44667424. Its totient is φ = 11176704.

The previous prime is 22431391. The next prime is 22431427. The reversal of 22431424 is 42413422.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22431395 and 22431404.

It is not an unprimeable number, because it can be changed into a prime (22431427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29254 + ... + 30010.

Almost surely, 2^22431424 is an apocalyptic number.

It is an amenable number.

22431424 is a deficient number, since it is larger than the sum of its proper divisors (22236000).

22431424 is an equidigital number, since it uses as much as digits as its factorization.

22431424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232 (or 1222 counting only the distinct ones).

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

The square root of 22431424 is about 4736.1824289189. The cubic root of 22431424 is about 282.0237057348.

Adding to 22431424 its reverse (42413422), we get a palindrome (64844846).

The spelling of 22431424 in words is "twenty-two million, four hundred thirty-one thousand, four hundred twenty-four".