22525225 has 6 divisors (see below), whose sum is σ = 27931310. Its totient is φ = 18020160.

The previous prime is 22525219. The next prime is 22525229. The reversal of 22525225 is 52252522.

It can be written as a sum of positive squares in 3 ways, for example, as 1245456 + 21279769 = 1116^2 + 4613^2 .

It is not a de Polignac number, because 22525225 - 2⁹ = 22524713 is a prime.

It is a super-2 number, since 2×22525225² = 1014771522601250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 901009 = 22525225 / (2 + 2 + 5 + 2 + 5 + 2 + 2 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 22525225.

It is not an unprimeable number, because it can be changed into a prime (22525229) 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, 450480 + ... + 450529.

Almost surely, 2^22525225 is an apocalyptic number.

22525225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22525225 is a deficient number, since it is larger than the sum of its proper divisors (5406085).

22525225 is an equidigital number, since it uses as much as digits as its factorization.

22525225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901019 (or 901014 counting only the distinct ones).

The product of its digits is 4000, while the sum is 25.

The square root of 22525225 is about 4746.0746938918. The cubic root of 22525225 is about 282.4162698577.

Adding to 22525225 its reverse (52252522), we get a palindrome (74777747).

The spelling of 22525225 in words is "twenty-two million, five hundred twenty-five thousand, two hundred twenty-five".