216311165 has 8 divisors (see below), whose sum is σ = 296655360. Its totient is φ = 148327632.

The previous prime is 216311153. The next prime is 216311167. The reversal of 216311165 is 561113612.

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

It is a cyclic number.

It is not a de Polignac number, because 216311165 - 2⁶ = 216311101 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216311167) 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, 3090125 + ... + 3090194.

It is an arithmetic number, because the mean of its divisors is an integer number (37081920).

Almost surely, 2^216311165 is an apocalyptic number.

It is an amenable number.

216311165 is a deficient number, since it is larger than the sum of its proper divisors (80344195).

216311165 is an equidigital number, since it uses as much as digits as its factorization.

216311165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6180331.

The product of its digits is 1080, while the sum is 26.

The square root of 216311165 is about 14707.5206952090. The cubic root of 216311165 is about 600.2879775002.

Adding to 216311165 its reverse (561113612), we get a palindrome (777424777).

The spelling of 216311165 in words is "two hundred sixteen million, three hundred eleven thousand, one hundred sixty-five".