216299 has 4 divisors (see below), whose sum is σ = 219336. Its totient is φ = 213264.

The previous prime is 216289. The next prime is 216317. The reversal of 216299 is 992612.

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

It is a cyclic number.

It is not a de Polignac number, because 216299 - 2¹² = 212203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216259) 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, 1409 + ... + 1554.

It is an arithmetic number, because the mean of its divisors is an integer number (54834).

2²¹⁶²⁹⁹ is an apocalyptic number.

216299 is a deficient number, since it is larger than the sum of its proper divisors (3037).

216299 is an equidigital number, since it uses as much as digits as its factorization.

216299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3036.

The product of its digits is 1944, while the sum is 29.

The square root of 216299 is about 465.0795630857. The cubic root of 216299 is about 60.0276724205.

It can be divided in two parts, 216 and 299, that added together give a palindrome (515).

The spelling of 216299 in words is "two hundred sixteen thousand, two hundred ninety-nine".