216319 has 2 divisors, whose sum is σ = 216320. Its totient is φ = 216318.

The previous prime is 216317. The next prime is 216329. The reversal of 216319 is 913612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216319 - 2¹ = 216317 is a prime.

It is a super-2 number, since 2×216319² = 93587819522, which contains 22 as substring.

Together with 216317, it forms a pair of twin primes.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 216319.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108159 + 108160.

It is an arithmetic number, because the mean of its divisors is an integer number (108160).

2²¹⁶³¹⁹ is an apocalyptic number.

216319 is a deficient number, since it is larger than the sum of its proper divisors (1).

216319 is an equidigital number, since it uses as much as digits as its factorization.

216319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 22.

The square root of 216319 is about 465.1010642860. The cubic root of 216319 is about 60.0295225083.

It can be divided in two parts, 216 and 319, that added together give a palindrome (535).

The spelling of 216319 in words is "two hundred sixteen thousand, three hundred nineteen".