216275 has 12 divisors (see below), whose sum is σ = 276024. Its totient is φ = 168000.

The previous prime is 216263. The next prime is 216289. The reversal of 216275 is 572612.

It is not a de Polignac number, because 216275 - 2⁴ = 216259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216275.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 920 + ... + 1130.

It is an arithmetic number, because the mean of its divisors is an integer number (23002).

2²¹⁶²⁷⁵ is an apocalyptic number.

216275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

216275 is a deficient number, since it is larger than the sum of its proper divisors (59749).

216275 is a wasteful number, since it uses less digits than its factorization.

216275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 257 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 216275 is about 465.0537603331. The cubic root of 216275 is about 60.0254521646.

Adding to 216275 its reverse (572612), we get a palindrome (788887).

The spelling of 216275 in words is "two hundred sixteen thousand, two hundred seventy-five".