217273354366093 has 2 divisors, whose sum is σ = 217273354366094. Its totient is φ = 217273354366092.

The previous prime is 217273354366021. The next prime is 217273354366129. The reversal of 217273354366093 is 390663453372712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148858007744644 + 68415346621449 = 12200738^2 + 8271357^2 .

It is a cyclic number.

It is not a de Polignac number, because 217273354366093 - 2⁹ = 217273354365581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217273354966093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108636677183046 + 108636677183047.

It is an arithmetic number, because the mean of its divisors is an integer number (108636677183047).

Almost surely, 2^{217273354366093} is an apocalyptic number.

It is an amenable number.

217273354366093 is a deficient number, since it is larger than the sum of its proper divisors (1).

217273354366093 is an equidigital number, since it uses as much as digits as its factorization.

217273354366093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102876480, while the sum is 61.

The spelling of 217273354366093 in words is "two hundred seventeen trillion, two hundred seventy-three billion, three hundred fifty-four million, three hundred sixty-six thousand, ninety-three".