22116225 has 24 divisors (see below), whose sum is σ = 38158272. Its totient is φ = 11281600.

The previous prime is 22116217. The next prime is 22116229. The reversal of 22116225 is 52261122.

It is a happy number.

It is not a de Polignac number, because 22116225 - 2³ = 22116217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22116229) 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, 4686 + ... + 8135.

It is an arithmetic number, because the mean of its divisors is an integer number (1589928).

Almost surely, 2^22116225 is an apocalyptic number.

22116225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22116225 is a deficient number, since it is larger than the sum of its proper divisors (16042047).

22116225 is a wasteful number, since it uses less digits than its factorization.

22116225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12857 (or 12852 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 22116225 is about 4702.7890660756. The cubic root of 22116225 is about 280.6965015561.

Adding to 22116225 its reverse (52261122), we get a palindrome (74377347).

The spelling of 22116225 in words is "twenty-two million, one hundred sixteen thousand, two hundred twenty-five".