222320345 has 12 divisors (see below), whose sum is σ = 288885996. Its totient is φ = 164174400.

The previous prime is 222320317. The next prime is 222320347. The reversal of 222320345 is 543023222.

It can be written as a sum of positive squares in 6 ways, for example, as 17572864 + 204747481 = 4192^2 + 14309^2 .

It is not a de Polignac number, because 222320345 - 2⁶ = 222320281 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222320345.

It is not an unprimeable number, because it can be changed into a prime (222320347) 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, 130706 + ... + 132395.

It is an arithmetic number, because the mean of its divisors is an integer number (24073833).

Almost surely, 2^222320345 is an apocalyptic number.

It is an amenable number.

222320345 is a deficient number, since it is larger than the sum of its proper divisors (66565651).

222320345 is a wasteful number, since it uses less digits than its factorization.

222320345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263132 (or 263119 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 222320345 is about 14910.4106247950. The cubic root of 222320345 is about 605.7960016191.

Adding to 222320345 its reverse (543023222), we get a palindrome (765343567).

The spelling of 222320345 in words is "two hundred twenty-two million, three hundred twenty thousand, three hundred forty-five".