217907502343 has 2 divisors, whose sum is σ = 217907502344. Its totient is φ = 217907502342.

The previous prime is 217907502311. The next prime is 217907502353. The reversal of 217907502343 is 343205709712.

217907502343 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 217907502343 - 2⁵ = 217907502311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 217907502343.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217907502353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108953751171 + 108953751172.

It is an arithmetic number, because the mean of its divisors is an integer number (108953751172).

Almost surely, 2^217907502343 is an apocalyptic number.

217907502343 is a deficient number, since it is larger than the sum of its proper divisors (1).

217907502343 is an equidigital number, since it uses as much as digits as its factorization.

217907502343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 43.

The spelling of 217907502343 in words is "two hundred seventeen billion, nine hundred seven million, five hundred two thousand, three hundred forty-three".