22188125 has 20 divisors (see below), whose sum is σ = 28041024. Its totient is φ = 17550000.

The previous prime is 22188119. The next prime is 22188163. The reversal of 22188125 is 52188122.

It is a happy number.

It is not a de Polignac number, because 22188125 - 2¹⁴ = 22171741 is a prime.

It is a Duffinian number.

It is a Curzon number.

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 19 ways as a sum of consecutive naturals, for example, 81740 + ... + 82010.

Almost surely, 2^22188125 is an apocalyptic number.

22188125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22188125 is a deficient number, since it is larger than the sum of its proper divisors (5852899).

22188125 is an equidigital number, since it uses as much as digits as its factorization.

22188125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422 (or 407 counting only the distinct ones).

The product of its digits is 2560, while the sum is 29.

The square root of 22188125 is about 4710.4272629985. The cubic root of 22188125 is about 281.0003546050. Note that the first 3 decimals are identical.

The spelling of 22188125 in words is "twenty-two million, one hundred eighty-eight thousand, one hundred twenty-five".