222712309 has 2 divisors, whose sum is σ = 222712310. Its totient is φ = 222712308.

The previous prime is 222712283. The next prime is 222712379. The reversal of 222712309 is 903217222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222666084 + 46225 = 14922^2 + 215^2 .

It is a cyclic number.

It is not a de Polignac number, because 222712309 - 2⁷ = 222712181 is a prime.

It is a super-2 number, since 2×222712309² = 99201545160222962, which contains 22 as substring.

It is a Chen prime.

It is equal to p_12263752 and since 222712309 and 12263752 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222712379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111356154 + 111356155.

It is an arithmetic number, because the mean of its divisors is an integer number (111356155).

Almost surely, 2^222712309 is an apocalyptic number.

It is an amenable number.

222712309 is a deficient number, since it is larger than the sum of its proper divisors (1).

222712309 is an equidigital number, since it uses as much as digits as its factorization.

222712309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 222712309 is about 14923.5488071705. The cubic root of 222712309 is about 606.1518107320.

The spelling of 222712309 in words is "two hundred twenty-two million, seven hundred twelve thousand, three hundred nine".