222220305 has 12 divisors (see below), whose sum is σ = 385181940. Its totient is φ = 118517472.

The previous prime is 222220291. The next prime is 222220309. The reversal of 222220305 is 503022222.

It can be written as a sum of positive squares in 2 ways, for example, as 144216081 + 78004224 = 12009^2 + 8832^2 .

It is not a de Polignac number, because 222220305 - 2⁴ = 222220289 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (222220309) 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, 2469070 + ... + 2469159.

It is an arithmetic number, because the mean of its divisors is an integer number (32098495).

Almost surely, 2^222220305 is an apocalyptic number.

It is an amenable number.

222220305 is a deficient number, since it is larger than the sum of its proper divisors (162961635).

222220305 is a wasteful number, since it uses less digits than its factorization.

222220305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4938240 (or 4938237 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 222220305 is about 14907.0555442716. The cubic root of 222220305 is about 605.7051223604.

Adding to 222220305 its reverse (503022222), we get a palindrome (725242527).

The spelling of 222220305 in words is "two hundred twenty-two million, two hundred twenty thousand, three hundred five".