217713854287 has 16 divisors (see below), whose sum is σ = 236786723712. Its totient is φ = 199364474880.

The previous prime is 217713854279. The next prime is 217713854297. The reversal of 217713854287 is 782458317712.

217713854287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 217713854287 - 2³ = 217713854279 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 (217713854297) 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 15 ways as a sum of consecutive naturals, for example, 169758 + ... + 681355.

It is an arithmetic number, because the mean of its divisors is an integer number (14799170232).

Almost surely, 2^217713854287 is an apocalyptic number.

217713854287 is a deficient number, since it is larger than the sum of its proper divisors (19072869425).

217713854287 is a wasteful number, since it uses less digits than its factorization.

217713854287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851538.

The product of its digits is 5268480, while the sum is 55.

The spelling of 217713854287 in words is "two hundred seventeen billion, seven hundred thirteen million, eight hundred fifty-four thousand, two hundred eighty-seven".