22645825 has 6 divisors (see below), whose sum is σ = 28080854. Its totient is φ = 18116640.

The previous prime is 22645811. The next prime is 22645829. The reversal of 22645825 is 52854622.

It can be written as a sum of positive squares in 3 ways, for example, as 4190209 + 18455616 = 2047^2 + 4296^2 .

It is not a de Polignac number, because 22645825 - 2¹³ = 22637633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22645829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 452892 + ... + 452941.

Almost surely, 2^22645825 is an apocalyptic number.

22645825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22645825 is a deficient number, since it is larger than the sum of its proper divisors (5435029).

22645825 is an equidigital number, since it uses as much as digits as its factorization.

22645825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905843 (or 905838 counting only the distinct ones).

The product of its digits is 38400, while the sum is 34.

The square root of 22645825 is about 4758.7629695121. The cubic root of 22645825 is about 282.9193916933.

The spelling of 22645825 in words is "twenty-two million, six hundred forty-five thousand, eight hundred twenty-five".