22705825 has 6 divisors (see below), whose sum is σ = 28155254. Its totient is φ = 18164640.

The previous prime is 22705819. The next prime is 22705843. The reversal of 22705825 is 52850722.

It can be written as a sum of positive squares in 3 ways, for example, as 719104 + 21986721 = 848^2 + 4689^2 .

It is not a de Polignac number, because 22705825 - 2²³ = 14317217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 454092 + ... + 454141.

Almost surely, 2^22705825 is an apocalyptic number.

22705825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22705825 is a deficient number, since it is larger than the sum of its proper divisors (5449429).

22705825 is an equidigital number, since it uses as much as digits as its factorization.

22705825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908243 (or 908238 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 22705825 is about 4765.0629586607. The cubic root of 22705825 is about 283.1690358501.

The spelling of 22705825 in words is "twenty-two million, seven hundred five thousand, eight hundred twenty-five".