217104057205 has 96 divisors (see below), whose sum is σ = 322891833600. Its totient is φ = 140028577920.

The previous prime is 217104057199. The next prime is 217104057211. The reversal of 217104057205 is 502750401712.

It is an interprime number because it is at equal distance from previous prime (217104057199) and next prime (217104057211).

It is not a de Polignac number, because 217104057205 - 2¹⁷ = 217103926133 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 55339374 + ... + 55343296.

It is an arithmetic number, because the mean of its divisors is an integer number (3363456600).

Almost surely, 2^217104057205 is an apocalyptic number.

It is an amenable number.

217104057205 is a deficient number, since it is larger than the sum of its proper divisors (105787776395).

217104057205 is an equidigital number, since it uses as much as digits as its factorization.

217104057205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4056 (or 4019 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 34.

Adding to 217104057205 its reverse (502750401712), we get a palindrome (719854458917).

The spelling of 217104057205 in words is "two hundred seventeen billion, one hundred four million, fifty-seven thousand, two hundred five".