216266 has 8 divisors (see below), whose sum is σ = 329184. Its totient is φ = 106540.

The previous prime is 216263. The next prime is 216289. The reversal of 216266 is 662612.

216266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 216266.

It is not an unprimeable number, because it can be changed into a prime (216263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620 + ... + 903.

It is an arithmetic number, because the mean of its divisors is an integer number (41148).

2²¹⁶²⁶⁶ is an apocalyptic number.

216266 is a deficient number, since it is larger than the sum of its proper divisors (112918).

216266 is a wasteful number, since it uses less digits than its factorization.

216266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596.

The product of its digits is 864, while the sum is 23.

The square root of 216266 is about 465.0440839318. The cubic root of 216266 is about 60.0246195262.

Adding to 216266 its reverse (662612), we get a palindrome (878878).

The spelling of 216266 in words is "two hundred sixteen thousand, two hundred sixty-six".