217258508323 has 8 divisors (see below), whose sum is σ = 226711266048. Its totient is φ = 207806311944.

The previous prime is 217258508309. The next prime is 217258508333. The reversal of 217258508323 is 323805852712.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-217258508323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217258508333) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 778690 + ... + 1020232.

It is an arithmetic number, because the mean of its divisors is an integer number (28338908256).

Almost surely, 2^217258508323 is an apocalyptic number.

217258508323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

217258508323 is a deficient number, since it is larger than the sum of its proper divisors (9452757725).

217258508323 is a wasteful number, since it uses less digits than its factorization.

217258508323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280673.

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 217258508323 in words is "two hundred seventeen billion, two hundred fifty-eight million, five hundred eight thousand, three hundred twenty-three".