216682 has 8 divisors (see below), whose sum is σ = 344196. Its totient is φ = 101952.

The previous prime is 216679. The next prime is 216703. The reversal of 216682 is 286612.

It can be written as a sum of positive squares in 2 ways, for example, as 194481 + 22201 = 441^2 + 149^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3153 + ... + 3220.

2²¹⁶⁶⁸² is an apocalyptic number.

216682 is a deficient number, since it is larger than the sum of its proper divisors (127514).

216682 is a wasteful number, since it uses less digits than its factorization.

216682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6392.

The product of its digits is 1152, while the sum is 25.

The square root of 216682 is about 465.4911384763. The cubic root of 216682 is about 60.0630818030.

It can be divided in two parts, 216 and 682, that added together give a palindrome (898).

The spelling of 216682 in words is "two hundred sixteen thousand, six hundred eighty-two".