222785009 has 2 divisors, whose sum is σ = 222785010. Its totient is φ = 222785008.

The previous prime is 222784997. The next prime is 222785027. The reversal of 222785009 is 900587222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189145009 + 33640000 = 13753^2 + 5800^2 .

It is a cyclic number.

It is not a de Polignac number, because 222785009 - 2¹⁶ = 222719473 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 222785009.

It is not a weakly prime, because it can be changed into another prime (222785039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111392504 + 111392505.

It is an arithmetic number, because the mean of its divisors is an integer number (111392505).

Almost surely, 2^222785009 is an apocalyptic number.

It is an amenable number.

222785009 is a deficient number, since it is larger than the sum of its proper divisors (1).

222785009 is an equidigital number, since it uses as much as digits as its factorization.

222785009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 222785009 is about 14925.9843561488. The cubic root of 222785009 is about 606.2177589543.

The spelling of 222785009 in words is "two hundred twenty-two million, seven hundred eighty-five thousand, nine".