22288625 has 16 divisors (see below), whose sum is σ = 28501200. Its totient is φ = 17392000.

The previous prime is 22288621. The next prime is 22288681. The reversal of 22288625 is 52688222.

It can be written as a sum of positive squares in 8 ways, for example, as 19439281 + 2849344 = 4409^2 + 1688^2 .

It is not a de Polignac number, because 22288625 - 2² = 22288621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22288621) 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 15 ways as a sum of consecutive naturals, for example, 2951 + ... + 7299.

It is an arithmetic number, because the mean of its divisors is an integer number (1781325).

Almost surely, 2^22288625 is an apocalyptic number.

22288625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22288625 is a deficient number, since it is larger than the sum of its proper divisors (6212575).

22288625 is an equidigital number, since it uses as much as digits as its factorization.

22288625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4405 (or 4395 counting only the distinct ones).

The product of its digits is 30720, while the sum is 35.

The square root of 22288625 is about 4721.0830325255. The cubic root of 22288625 is about 281.4239746657.

The spelling of 22288625 in words is "twenty-two million, two hundred eighty-eight thousand, six hundred twenty-five".