216959 has 4 divisors (see below), whose sum is σ = 226416. Its totient is φ = 207504.

The previous prime is 216947. The next prime is 216967. The reversal of 216959 is 959612.

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 216959 - 2⁸ = 216703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 216959.

It is not an unprimeable number, because it can be changed into a prime (216919) 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, 4694 + ... + 4739.

It is an arithmetic number, because the mean of its divisors is an integer number (56604).

2²¹⁶⁹⁵⁹ is an apocalyptic number.

216959 is a deficient number, since it is larger than the sum of its proper divisors (9457).

216959 is an equidigital number, since it uses as much as digits as its factorization.

216959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9456.

The product of its digits is 4860, while the sum is 32.

The square root of 216959 is about 465.7885786492. The cubic root of 216959 is about 60.0886652064.

It can be divided in two parts, 2 and 16959, that added together give a palindrome (16961).

The spelling of 216959 in words is "two hundred sixteen thousand, nine hundred fifty-nine".