22144312 has 16 divisors (see below), whose sum is σ = 42486840. Its totient is φ = 10814496.

The previous prime is 22144307. The next prime is 22144327. The reversal of 22144312 is 21344122.

It is a self number, because there is not a number n which added to its sum of digits gives 22144312.

It is a congruent number.

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, 31843 + ... + 32530.

Almost surely, 2^22144312 is an apocalyptic number.

It is an amenable number.

22144312 is a deficient number, since it is larger than the sum of its proper divisors (20342528).

22144312 is a wasteful number, since it uses less digits than its factorization.

22144312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64422 (or 64418 counting only the distinct ones).

The product of its digits is 384, while the sum is 19.

The square root of 22144312 is about 4705.7743252307. The cubic root of 22144312 is about 280.8152769128.

Adding to 22144312 its reverse (21344122), we get a palindrome (43488434).

The spelling of 22144312 in words is "twenty-two million, one hundred forty-four thousand, three hundred twelve".