216364 has 6 divisors (see below), whose sum is σ = 378644. Its totient is φ = 108180.

The previous prime is 216347. The next prime is 216371. The reversal of 216364 is 463612.

216364 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 2¹⁷ + 1 + 3⁹ + 6² + 6² + 4⁸ .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27042 + ... + 27049.

2²¹⁶³⁶⁴ is an apocalyptic number.

It is an amenable number.

216364 is a deficient number, since it is larger than the sum of its proper divisors (162280).

216364 is a wasteful number, since it uses less digits than its factorization.

216364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54095 (or 54093 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 216364 is about 465.1494383529. The cubic root of 216364 is about 60.0336847891.

Adding to 216364 its reverse (463612), we get a palindrome (679976).

The spelling of 216364 in words is "two hundred sixteen thousand, three hundred sixty-four".