22512144 has 40 divisors (see below), whose sum is σ = 58514112. Its totient is φ = 7457920.

The previous prime is 22512143. The next prime is 22512151. The reversal of 22512144 is 44121522.

It is a self number, because there is not a number n which added to its sum of digits gives 22512144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22512143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6949 + ... + 9659.

Almost surely, 2^22512144 is an apocalyptic number.

22512144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22512144 is an abundant number, since it is smaller than the sum of its proper divisors (36001968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22512144 is a wasteful number, since it uses less digits than its factorization.

22512144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2895 (or 2889 counting only the distinct ones).

The product of its digits is 640, while the sum is 21.

The square root of 22512144 is about 4744.6964075692. The cubic root of 22512144 is about 282.3615903805.

Adding to 22512144 its reverse (44121522), we get a palindrome (66633666).

The spelling of 22512144 in words is "twenty-two million, five hundred twelve thousand, one hundred forty-four".