216516603271 has 2 divisors, whose sum is σ = 216516603272. Its totient is φ = 216516603270.

The previous prime is 216516603269. The next prime is 216516603313. The reversal of 216516603271 is 172306615612.

216516603271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216516603271 - 2¹ = 216516603269 is a prime.

Together with 216516603269, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216516603571) 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, 108258301635 + 108258301636.

It is an arithmetic number, because the mean of its divisors is an integer number (108258301636).

Almost surely, 2^216516603271 is an apocalyptic number.

216516603271 is a deficient number, since it is larger than the sum of its proper divisors (1).

216516603271 is an equidigital number, since it uses as much as digits as its factorization.

216516603271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 216516603271 in words is "two hundred sixteen billion, five hundred sixteen million, six hundred three thousand, two hundred seventy-one".