22644425 has 12 divisors (see below), whose sum is σ = 29731356. Its totient is φ = 17049600.

The previous prime is 22644421. The next prime is 22644437. The reversal of 22644425 is 52444622.

It can be written as a sum of positive squares in 6 ways, for example, as 15376 + 22629049 = 124^2 + 4757^2 .

It is not a de Polignac number, because 22644425 - 2² = 22644421 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22644421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26216 + ... + 27065.

It is an arithmetic number, because the mean of its divisors is an integer number (2477613).

Almost surely, 2^22644425 is an apocalyptic number.

22644425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22644425 is a deficient number, since it is larger than the sum of its proper divisors (7086931).

22644425 is a wasteful number, since it uses less digits than its factorization.

22644425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53308 (or 53303 counting only the distinct ones).

The product of its digits is 15360, while the sum is 29.

The square root of 22644425 is about 4758.6158701875. The cubic root of 22644425 is about 282.9135614014.

The spelling of 22644425 in words is "twenty-two million, six hundred forty-four thousand, four hundred twenty-five".