22750225 has 12 divisors (see below), whose sum is σ = 28867696. Its totient is φ = 17776080.

The previous prime is 22750213. The next prime is 22750241. The reversal of 22750225 is 52205722.

It is not a de Polignac number, because 22750225 - 2⁵ = 22750193 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22750225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9507 + ... + 11656.

Almost surely, 2^22750225 is an apocalyptic number.

22750225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22750225 is a deficient number, since it is larger than the sum of its proper divisors (6117471).

22750225 is a wasteful number, since it uses less digits than its factorization.

22750225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21216 (or 21211 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 22750225 is about 4769.7195934352. The cubic root of 22750225 is about 283.3534895311.

Adding to 22750225 its reverse (52205722), we get a palindrome (74955947).

The spelling of 22750225 in words is "twenty-two million, seven hundred fifty thousand, two hundred twenty-five".