22509225 has 24 divisors (see below), whose sum is σ = 41351520. Its totient is φ = 12004560.

The previous prime is 22509217. The next prime is 22509229. The reversal of 22509225 is 52290522.

It is not a de Polignac number, because 22509225 - 2³ = 22509217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

22509225 is a modest number, since divided by 9225 gives 225 as remainder.

It is not an unprimeable number, because it can be changed into a prime (22509229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15999 + ... + 17348.

It is an arithmetic number, because the mean of its divisors is an integer number (1722980).

Almost surely, 2^22509225 is an apocalyptic number.

22509225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22509225 is a deficient number, since it is larger than the sum of its proper divisors (18842295).

22509225 is a wasteful number, since it uses less digits than its factorization.

22509225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33366 (or 33355 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 22509225 is about 4744.3887909825. The cubic root of 22509225 is about 282.3493858698.

Adding to 22509225 its reverse (52290522), we get a palindrome (74799747).

The spelling of 22509225 in words is "twenty-two million, five hundred nine thousand, two hundred twenty-five".