217491532383 has 8 divisors (see below), whose sum is σ = 305251273600. Its totient is φ = 137363073048.

The previous prime is 217491532369. The next prime is 217491532393. The reversal of 217491532383 is 383235194712.

217491532383 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 217491532383 - 2⁸ = 217491532127 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 (217491532343) 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 in 7 ways as a sum of consecutive naturals, for example, 1907820403 + ... + 1907820516.

It is an arithmetic number, because the mean of its divisors is an integer number (38156409200).

Almost surely, 2^217491532383 is an apocalyptic number.

217491532383 is a deficient number, since it is larger than the sum of its proper divisors (87759741217).

217491532383 is a wasteful number, since it uses less digits than its factorization.

217491532383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3815640941.

The product of its digits is 1088640, while the sum is 48.

The spelling of 217491532383 in words is "two hundred seventeen billion, four hundred ninety-one million, five hundred thirty-two thousand, three hundred eighty-three".