217343185743117 has 8 divisors (see below), whose sum is σ = 331189616370496. Its totient is φ = 124196106138912.

The previous prime is 217343185743067. The next prime is 217343185743121. The reversal of 217343185743117 is 711347581343712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 217343185743117 - 2¹² = 217343185739021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217343185743217) 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 in 7 ways as a sum of consecutive naturals, for example, 5174837755768 + ... + 5174837755809.

It is an arithmetic number, because the mean of its divisors is an integer number (41398702046312).

Almost surely, 2^{217343185743117} is an apocalyptic number.

It is an amenable number.

217343185743117 is a deficient number, since it is larger than the sum of its proper divisors (113846430627379).

217343185743117 is a wasteful number, since it uses less digits than its factorization.

217343185743117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10349675511587.

The product of its digits is 11854080, while the sum is 57.

The spelling of 217343185743117 in words is "two hundred seventeen trillion, three hundred forty-three billion, one hundred eighty-five million, seven hundred forty-three thousand, one hundred seventeen".