22204444225 has 6 divisors (see below), whose sum is σ = 27533510870. Its totient is φ = 17763555360.

The previous prime is 22204444219. The next prime is 22204444247. The reversal of 22204444225 is 52244440222.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1760305936 + 20444138289 = 41956^2 + 142983^2 .

It is not a de Polignac number, because 22204444225 - 2¹⁹ = 22203919937 is a prime.

It is a super-2 number, since 2×22204444225² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 444088860 + ... + 444088909.

Almost surely, 2^22204444225 is an apocalyptic number.

22204444225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22204444225 is a deficient number, since it is larger than the sum of its proper divisors (5329066645).

22204444225 is an equidigital number, since it uses as much as digits as its factorization.

22204444225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888177779 (or 888177774 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 31.

Adding to 22204444225 its reverse (52244440222), we get a palindrome (74448884447).

The spelling of 22204444225 in words is "twenty-two billion, two hundred four million, four hundred forty-four thousand, two hundred twenty-five".