22809825 has 18 divisors (see below), whose sum is σ = 40855334. Its totient is φ = 12165120.

The previous prime is 22809821. The next prime is 22809827. The reversal of 22809825 is 52890822.

It can be written as a sum of positive squares in 3 ways, for example, as 5645376 + 17164449 = 2376^2 + 4143^2 .

It is not a de Polignac number, because 22809825 - 2² = 22809821 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22809825.

It is not an unprimeable number, because it can be changed into a prime (22809821) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 50464 + ... + 50913.

Almost surely, 2^22809825 is an apocalyptic number.

22809825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22809825 is a deficient number, since it is larger than the sum of its proper divisors (18045509).

22809825 is a wasteful number, since it uses less digits than its factorization.

22809825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101393 (or 101385 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 22809825 is about 4775.9632536275. The cubic root of 22809825 is about 283.6007126105.

The spelling of 22809825 in words is "twenty-two million, eight hundred nine thousand, eight hundred twenty-five".