216312163 has 4 divisors (see below), whose sum is σ = 218333880. Its totient is φ = 214290448.

The previous prime is 216312149. The next prime is 216312197. The reversal of 216312163 is 361213612.

216312163 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216312163 - 2⁹ = 216311651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216312143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1010698 + ... + 1010911.

It is an arithmetic number, because the mean of its divisors is an integer number (54583470).

Almost surely, 2^216312163 is an apocalyptic number.

216312163 is a deficient number, since it is larger than the sum of its proper divisors (2021717).

216312163 is a wasteful number, since it uses less digits than its factorization.

216312163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021716.

The product of its digits is 1296, while the sum is 25.

The square root of 216312163 is about 14707.5546233900. The cubic root of 216312163 is about 600.2889006865.

Adding to 216312163 its reverse (361213612), we get a palindrome (577525775).

The spelling of 216312163 in words is "two hundred sixteen million, three hundred twelve thousand, one hundred sixty-three".