216320217 has 8 divisors (see below), whose sum is σ = 288570240. Its totient is φ = 144141840.

The previous prime is 216320197. The next prime is 216320219. The reversal of 216320217 is 712023612.

216320217 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 216320217 - 2²³ = 207931609 is a prime.

It is a super-3 number, since 3×216320217³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (216320219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10417 + ... + 23262.

It is an arithmetic number, because the mean of its divisors is an integer number (36071280).

Almost surely, 2^216320217 is an apocalyptic number.

It is an amenable number.

216320217 is a deficient number, since it is larger than the sum of its proper divisors (72250023).

216320217 is a wasteful number, since it uses less digits than its factorization.

216320217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35823.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 216320217 is about 14707.8284257058. The cubic root of 216320217 is about 600.2963508251.

Adding to 216320217 its reverse (712023612), we get a palindrome (928343829).

The spelling of 216320217 in words is "two hundred sixteen million, three hundred twenty thousand, two hundred seventeen".