22665825 has 144 divisors (see below), whose sum is σ = 53079936. Its totient is φ = 9331200.

The previous prime is 22665823. The next prime is 22665847. The reversal of 22665825 is 52856622.

It is not a de Polignac number, because 22665825 - 2¹ = 22665823 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22665825.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22665823) by changing a digit.

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 143 ways as a sum of consecutive naturals, for example, 552805 + ... + 552845.

Almost surely, 2^22665825 is an apocalyptic number.

22665825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22665825 is an abundant number, since it is smaller than the sum of its proper divisors (30414111).

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

22665825 is a wasteful number, since it uses less digits than its factorization.

22665825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 69 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 22665825 is about 4760.8638921944. The cubic root of 22665825 is about 283.0026553543.

The spelling of 22665825 in words is "twenty-two million, six hundred sixty-five thousand, eight hundred twenty-five".