217936116233291 has 2 divisors, whose sum is σ = 217936116233292. Its totient is φ = 217936116233290.

The previous prime is 217936116233233. The next prime is 217936116233299. The reversal of 217936116233291 is 192332611639712.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-217936116233291 is a prime.

It is not a weakly prime, because it can be changed into another prime (217936116233299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108968058116645 + 108968058116646.

It is an arithmetic number, because the mean of its divisors is an integer number (108968058116646).

Almost surely, 2^{217936116233291} is an apocalyptic number.

217936116233291 is a deficient number, since it is larger than the sum of its proper divisors (1).

217936116233291 is an equidigital number, since it uses as much as digits as its factorization.

217936116233291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 56.

The spelling of 217936116233291 in words is "two hundred seventeen trillion, nine hundred thirty-six billion, one hundred sixteen million, two hundred thirty-three thousand, two hundred ninety-one".