217338323 has 2 divisors, whose sum is σ = 217338324. Its totient is φ = 217338322.

The previous prime is 217338311. The next prime is 217338349. The reversal of 217338323 is 323833712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 217338323 - 2⁸ = 217338067 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 217338323.

It is not a weakly prime, because it can be changed into another prime (217368323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108669161 + 108669162.

It is an arithmetic number, because the mean of its divisors is an integer number (108669162).

Almost surely, 2^217338323 is an apocalyptic number.

217338323 is a deficient number, since it is larger than the sum of its proper divisors (1).

217338323 is an equidigital number, since it uses as much as digits as its factorization.

217338323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 32.

The square root of 217338323 is about 14742.3988210874. The cubic root of 217338323 is about 601.2366374250.

The spelling of 217338323 in words is "two hundred seventeen million, three hundred thirty-eight thousand, three hundred twenty-three".