216316 has 12 divisors (see below), whose sum is σ = 388080. Its totient is φ = 105440.

The previous prime is 216289. The next prime is 216317. The reversal of 216316 is 613612.

It is a super-2 number, since 2×216316² = 93585223712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216293 and 216302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216317) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 496 + ... + 823.

It is an arithmetic number, because the mean of its divisors is an integer number (32340).

2²¹⁶³¹⁶ is an apocalyptic number.

It is an amenable number.

216316 is a deficient number, since it is larger than the sum of its proper divisors (171764).

216316 is a wasteful number, since it uses less digits than its factorization.

216316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364 (or 1362 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 216316 is about 465.0978391694. The cubic root of 216316 is about 60.0292450024.

Adding to 216316 its reverse (613612), we get a palindrome (829928).

The spelling of 216316 in words is "two hundred sixteen thousand, three hundred sixteen".