216982 has 16 divisors (see below), whose sum is σ = 349920. Its totient is φ = 100672.

The previous prime is 216973. The next prime is 216991. The reversal of 216982 is 289612.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (216973) and next prime (216991).

It is a plaindrome in base 13 and base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 216982.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2394 + ... + 2482.

It is an arithmetic number, because the mean of its divisors is an integer number (21870).

2²¹⁶⁹⁸² is an apocalyptic number.

216982 is a deficient number, since it is larger than the sum of its proper divisors (132938).

216982 is a wasteful number, since it uses less digits than its factorization.

216982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167.

The product of its digits is 1728, while the sum is 28.

The square root of 216982 is about 465.8132673078. The cubic root of 216982 is about 60.0907884808.

The spelling of 216982 in words is "two hundred sixteen thousand, nine hundred eighty-two".