216382 has 4 divisors (see below), whose sum is σ = 324576. Its totient is φ = 108190.

The previous prime is 216379. The next prime is 216397. The reversal of 216382 is 283612.

216382 is nontrivially palindromic in base 6.

216382 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 as a sum of consecutive naturals, namely, 54094 + ... + 54097.

It is an arithmetic number, because the mean of its divisors is an integer number (81144).

2²¹⁶³⁸² is an apocalyptic number.

216382 is a deficient number, since it is larger than the sum of its proper divisors (108194).

216382 is a wasteful number, since it uses less digits than its factorization.

216382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108193.

The product of its digits is 576, while the sum is 22.

The square root of 216382 is about 465.1687865711. The cubic root of 216382 is about 60.0353495398.

Adding to 216382 its reverse (283612), we get a palindrome (499994).

It can be divided in two parts, 2 and 16382, that added together give a 14-th power (16384 = 2¹⁴).

The spelling of 216382 in words is "two hundred sixteen thousand, three hundred eighty-two".