222312209 has 16 divisors (see below), whose sum is σ = 265821696. Its totient is φ = 181939200.

The previous prime is 222312199. The next prime is 222312221. The reversal of 222312209 is 902213222.

It is a cyclic number.

It is not a de Polignac number, because 222312209 - 2²⁴ = 205534993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (222315209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5249 + ... + 21729.

It is an arithmetic number, because the mean of its divisors is an integer number (16613856).

Almost surely, 2^222312209 is an apocalyptic number.

It is an amenable number.

222312209 is a deficient number, since it is larger than the sum of its proper divisors (43509487).

222312209 is a wasteful number, since it uses less digits than its factorization.

222312209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16576.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 222312209 is about 14910.1377927905. The cubic root of 222312209 is about 605.7886116576.

The spelling of 222312209 in words is "two hundred twenty-two million, three hundred twelve thousand, two hundred nine".