22152500 has 30 divisors (see below), whose sum is σ = 48448554. Its totient is φ = 8860000.

The previous prime is 22152467. The next prime is 22152509. The reversal of 22152500 is 525122.

It can be written as a sum of positive squares in 5 ways, for example, as 2421136 + 19731364 = 1556^2 + 4442^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22152509) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1931 + ... + 6930.

Almost surely, 2^22152500 is an apocalyptic number.

22152500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22152500 is an abundant number, since it is smaller than the sum of its proper divisors (26296054).

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

22152500 is an equidigital number, since it uses as much as digits as its factorization.

22152500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8885 (or 8868 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 22152500 is about 4706.6442397955. The cubic root of 22152500 is about 280.8498837252.

Adding to 22152500 its reverse (525122), we get a palindrome (22677622).

The spelling of 22152500 in words is "twenty-two million, one hundred fifty-two thousand, five hundred".