22131224 has 16 divisors (see below), whose sum is σ = 41574120. Its totient is φ = 11044800.

The previous prime is 22131223. The next prime is 22131259. The reversal of 22131224 is 42213122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22131223) 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, 2507 + ... + 7109.

Almost surely, 2^22131224 is an apocalyptic number.

It is an amenable number.

22131224 is a deficient number, since it is larger than the sum of its proper divisors (19442896).

22131224 is a wasteful number, since it uses less digits than its factorization.

22131224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5210 (or 5206 counting only the distinct ones).

The product of its digits is 192, while the sum is 17.

The square root of 22131224 is about 4704.3834877697. The cubic root of 22131224 is about 280.7599423923.

Adding to 22131224 its reverse (42213122), we get a palindrome (64344346).

The spelling of 22131224 in words is "twenty-two million, one hundred thirty-one thousand, two hundred twenty-four".