222402209 has 2 divisors, whose sum is σ = 222402210. Its totient is φ = 222402208.

The previous prime is 222402197. The next prime is 222402217. The reversal of 222402209 is 902204222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126067984 + 96334225 = 11228^2 + 9815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222402209 is a prime.

It is not a weakly prime, because it can be changed into another prime (222402259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111201104 + 111201105.

It is an arithmetic number, because the mean of its divisors is an integer number (111201105).

Almost surely, 2^222402209 is an apocalyptic number.

It is an amenable number.

222402209 is a deficient number, since it is larger than the sum of its proper divisors (1).

222402209 is an equidigital number, since it uses as much as digits as its factorization.

222402209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 222402209 is about 14913.1555681553. The cubic root of 222402209 is about 605.8703489879.

The spelling of 222402209 in words is "two hundred twenty-two million, four hundred two thousand, two hundred nine".