223256609 has 2 divisors, whose sum is σ = 223256610. Its totient is φ = 223256608.

The previous prime is 223256599. The next prime is 223256623. The reversal of 223256609 is 906652322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145323025 + 77933584 = 12055^2 + 8828^2 .

It is a cyclic number.

It is not a de Polignac number, because 223256609 - 2²⁰ = 222208033 is a prime.

It is a super-3 number, since 3×223256609³ (a number of 26 digits) contains 333 as substring.

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 (223256629) 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, 111628304 + 111628305.

It is an arithmetic number, because the mean of its divisors is an integer number (111628305).

Almost surely, 2^223256609 is an apocalyptic number.

It is an amenable number.

223256609 is a deficient number, since it is larger than the sum of its proper divisors (1).

223256609 is an equidigital number, since it uses as much as digits as its factorization.

223256609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 223256609 is about 14941.7739575995. The cubic root of 223256609 is about 606.6452126146.

The spelling of 223256609 in words is "two hundred twenty-three million, two hundred fifty-six thousand, six hundred nine".