22513244 has 24 divisors (see below), whose sum is σ = 42559440. Its totient is φ = 10358784.

The previous prime is 22513243. The next prime is 22513259. The reversal of 22513244 is 44231522.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22513243) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 28892 + ... + 29660.

It is an arithmetic number, because the mean of its divisors is an integer number (1773310).

Almost surely, 2^22513244 is an apocalyptic number.

It is an amenable number.

22513244 is a deficient number, since it is larger than the sum of its proper divisors (20046196).

22513244 is a wasteful number, since it uses less digits than its factorization.

22513244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349 (or 1347 counting only the distinct ones).

The product of its digits is 1920, while the sum is 23.

The square root of 22513244 is about 4744.8123250556. The cubic root of 22513244 is about 282.3661892715.

Adding to 22513244 its reverse (44231522), we get a palindrome (66744766).

The spelling of 22513244 in words is "twenty-two million, five hundred thirteen thousand, two hundred forty-four".