217233193 has 2 divisors, whose sum is σ = 217233194. Its totient is φ = 217233192.

The previous prime is 217233187. The next prime is 217233223. The reversal of 217233193 is 391332712.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174028864 + 43204329 = 13192^2 + 6573^2 .

It is a cyclic number.

It is not a de Polignac number, because 217233193 - 2²¹ = 215136041 is a prime.

It is not a weakly prime, because it can be changed into another prime (217231193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108616596 + 108616597.

It is an arithmetic number, because the mean of its divisors is an integer number (108616597).

Almost surely, 2^217233193 is an apocalyptic number.

It is an amenable number.

217233193 is a deficient number, since it is larger than the sum of its proper divisors (1).

217233193 is an equidigital number, since it uses as much as digits as its factorization.

217233193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 31.

The square root of 217233193 is about 14738.8328235312. The cubic root of 217233193 is about 601.1396792185.

The spelling of 217233193 in words is "two hundred seventeen million, two hundred thirty-three thousand, one hundred ninety-three".