222200225 has 12 divisors (see below), whose sum is σ = 296723196. Its totient is φ = 164086080.

The previous prime is 222200191. The next prime is 222200227. The reversal of 222200225 is 522002222.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 42667024 + 179533201 = 6532^2 + 13399^2 .

It is not a de Polignac number, because 222200225 - 2¹⁸ = 221938081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222200227) 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 11 ways as a sum of consecutive naturals, for example, 341522 + ... + 342171.

It is an arithmetic number, because the mean of its divisors is an integer number (24726933).

Almost surely, 2^222200225 is an apocalyptic number.

222200225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

222200225 is a deficient number, since it is larger than the sum of its proper divisors (74522971).

222200225 is a wasteful number, since it uses less digits than its factorization.

222200225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683716 (or 683711 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 222200225 is about 14906.3820224761. The cubic root of 222200225 is about 605.6868778152.

Adding to 222200225 its reverse (522002222), we get a palindrome (744202447).

It can be divided in two parts, 222200 and 225, that multiplied together give a triangular number (49995000 = T₉₉₉₉).

The spelling of 222200225 in words is "two hundred twenty-two million, two hundred thousand, two hundred twenty-five".