222320009 has 2 divisors, whose sum is σ = 222320010. Its totient is φ = 222320008.

The previous prime is 222319973. The next prime is 222320017. The reversal of 222320009 is 900023222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205836409 + 16483600 = 14347^2 + 4060^2 .

It is a cyclic number.

It is not a de Polignac number, because 222320009 - 2²⁴ = 205542793 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (222320029) 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 as a sum of consecutive naturals, namely, 111160004 + 111160005.

It is an arithmetic number, because the mean of its divisors is an integer number (111160005).

Almost surely, 2^222320009 is an apocalyptic number.

It is an amenable number.

222320009 is a deficient number, since it is larger than the sum of its proper divisors (1).

222320009 is an equidigital number, since it uses as much as digits as its factorization.

222320009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 222320009 is about 14910.3993574954. The cubic root of 222320009 is about 605.7956964325.

The spelling of 222320009 in words is "two hundred twenty-two million, three hundred twenty thousand, nine".