22521152 has 28 divisors (see below), whose sum is σ = 44880276. Its totient is φ = 11212800.

The previous prime is 22521133. The next prime is 22521193. The reversal of 22521152 is 25112522.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9096256 + 13424896 = 3016^2 + 3664^2 .

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18152 + ... + 19352.

It is an arithmetic number, because the mean of its divisors is an integer number (1602867).

Almost surely, 2^22521152 is an apocalyptic number.

It is an amenable number.

22521152 is a deficient number, since it is larger than the sum of its proper divisors (22359124).

22521152 is a wasteful number, since it uses less digits than its factorization.

22521152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506 (or 1496 counting only the distinct ones).

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

The square root of 22521152 is about 4745.6455830582. The cubic root of 22521152 is about 282.3992467084.

Adding to 22521152 its reverse (25112522), we get a palindrome (47633674).

The spelling of 22521152 in words is "twenty-two million, five hundred twenty-one thousand, one hundred fifty-two".