22490225 has 24 divisors (see below), whose sum is σ = 29343360. Its totient is φ = 17075520.

The previous prime is 22490213. The next prime is 22490231. The reversal of 22490225 is 52209422.

It is a de Polignac number, because none of the positive numbers 2^k-22490225 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22490194 and 22490203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48344 + ... + 48806.

It is an arithmetic number, because the mean of its divisors is an integer number (1222640).

Almost surely, 2^22490225 is an apocalyptic number.

22490225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22490225 is a deficient number, since it is larger than the sum of its proper divisors (6853135).

22490225 is a wasteful number, since it uses less digits than its factorization.

22490225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569 (or 564 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 22490225 is about 4742.3860028471. The cubic root of 22490225 is about 282.2699199550.

Adding to 22490225 its reverse (52209422), we get a palindrome (74699647).

The spelling of 22490225 in words is "twenty-two million, four hundred ninety thousand, two hundred twenty-five".