222305689 has 2 divisors, whose sum is σ = 222305690. Its totient is φ = 222305688.

The previous prime is 222305647. The next prime is 222305701. The reversal of 222305689 is 986503222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202208400 + 20097289 = 14220^2 + 4483^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222305689 is a prime.

It is not a weakly prime, because it can be changed into another prime (222305989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111152844 + 111152845.

It is an arithmetic number, because the mean of its divisors is an integer number (111152845).

Almost surely, 2^222305689 is an apocalyptic number.

It is an amenable number.

222305689 is a deficient number, since it is larger than the sum of its proper divisors (1).

222305689 is an equidigital number, since it uses as much as digits as its factorization.

222305689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 222305689 is about 14909.9191480035. The cubic root of 222305689 is about 605.7826893852.

The spelling of 222305689 in words is "two hundred twenty-two million, three hundred five thousand, six hundred eighty-nine".