22660225 has 24 divisors (see below), whose sum is σ = 33156608. Its totient is φ = 15033600.

The previous prime is 22660213. The next prime is 22660247. The reversal of 22660225 is 52206622.

It is not a de Polignac number, because 22660225 - 2⁵ = 22660193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 22660225.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3337 + ... + 7513.

Almost surely, 2^22660225 is an apocalyptic number.

22660225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22660225 is a deficient number, since it is larger than the sum of its proper divisors (10496383).

22660225 is a wasteful number, since it uses less digits than its factorization.

22660225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4225 (or 4220 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 22660225 is about 4760.2757273082. The cubic root of 22660225 is about 282.9793464681.

Adding to 22660225 its reverse (52206622), we get a palindrome (74866847).

The spelling of 22660225 in words is "twenty-two million, six hundred sixty thousand, two hundred twenty-five".