22511252 has 6 divisors (see below), whose sum is σ = 39394698. Its totient is φ = 11255624.

The previous prime is 22511243. The next prime is 22511299. The reversal of 22511252 is 25211522.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 22146436 + 364816 = 4706^2 + 604^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2813903 + ... + 2813910.

It is an arithmetic number, because the mean of its divisors is an integer number (6565783).

Almost surely, 2^22511252 is an apocalyptic number.

It is an amenable number.

22511252 is a deficient number, since it is larger than the sum of its proper divisors (16883446).

22511252 is a wasteful number, since it uses less digits than its factorization.

22511252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5627817 (or 5627815 counting only the distinct ones).

The product of its digits is 400, while the sum is 20.

The square root of 22511252 is about 4744.6024069462. The cubic root of 22511252 is about 282.3578609879.

Adding to 22511252 its reverse (25211522), we get a palindrome (47722774).

The spelling of 22511252 in words is "twenty-two million, five hundred eleven thousand, two hundred fifty-two".