216271 has 4 divisors (see below), whose sum is σ = 235944. Its totient is φ = 196600.

The previous prime is 216263. The next prime is 216289. The reversal of 216271 is 172612.

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 216271 - 2³ = 216263 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9820 + ... + 9841.

It is an arithmetic number, because the mean of its divisors is an integer number (58986).

2²¹⁶²⁷¹ is an apocalyptic number.

216271 is a deficient number, since it is larger than the sum of its proper divisors (19673).

216271 is a wasteful number, since it uses less digits than its factorization.

216271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19672.

The product of its digits is 168, while the sum is 19.

The square root of 216271 is about 465.0494597352. The cubic root of 216271 is about 60.0250821059.

Adding to 216271 its reverse (172612), we get a palindrome (388883).

The spelling of 216271 in words is "two hundred sixteen thousand, two hundred seventy-one".