22500225 has 36 divisors (see below), whose sum is σ = 43968912. Its totient is φ = 10908000.

The previous prime is 22500211. The next prime is 22500229. The reversal of 22500225 is 52200522.

It is not a de Polignac number, because 22500225 - 2⁵ = 22500193 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22500198 and 22500207.

It is not an unprimeable number, because it can be changed into a prime (22500229) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2071 + ... + 7020.

Almost surely, 2^22500225 is an apocalyptic number.

22500225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22500225 is a deficient number, since it is larger than the sum of its proper divisors (21468687).

22500225 is a wasteful number, since it uses less digits than its factorization.

22500225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9118 (or 9110 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 22500225 is about 4743.4402072757. The cubic root of 22500225 is about 282.3117496972.

Adding to 22500225 its reverse (52200522), we get a palindrome (74700747).

It can be divided in two parts, 22500 and 225, that multiplied together give a square (5062500 = 2250²).

The spelling of 22500225 in words is "twenty-two million, five hundred thousand, two hundred twenty-five".