22112225 has 6 divisors (see below), whose sum is σ = 27419190. Its totient is φ = 17689760.

The previous prime is 22112221. The next prime is 22112249. The reversal of 22112225 is 52221122.

It can be written as a sum of positive squares in 3 ways, for example, as 3041536 + 19070689 = 1744^2 + 4367^2 .

It is not a de Polignac number, because 22112225 - 2² = 22112221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112221) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 442220 + ... + 442269.

It is an arithmetic number, because the mean of its divisors is an integer number (4569865).

Almost surely, 2^22112225 is an apocalyptic number.

22112225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22112225 is a deficient number, since it is larger than the sum of its proper divisors (5306965).

22112225 is an equidigital number, since it uses as much as digits as its factorization.

22112225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884499 (or 884494 counting only the distinct ones).

The product of its digits is 160, while the sum is 17.

The square root of 22112225 is about 4702.3637672983. The cubic root of 22112225 is about 280.6795780275.

Adding to 22112225 its reverse (52221122), we get a palindrome (74333347).

The spelling of 22112225 in words is "twenty-two million, one hundred twelve thousand, two hundred twenty-five".