216835 has 8 divisors (see below), whose sum is σ = 275616. Its totient is φ = 163200.

The previous prime is 216829. The next prime is 216841. The reversal of 216835 is 538612.

It is a happy number.

216835 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (216829) and next prime (216841).

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

It is not a de Polignac number, because 216835 - 2⁵ = 216803 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1191 + ... + 1360.

It is an arithmetic number, because the mean of its divisors is an integer number (34452).

2²¹⁶⁸³⁵ is an apocalyptic number.

216835 is a deficient number, since it is larger than the sum of its proper divisors (58781).

216835 is a wasteful number, since it uses less digits than its factorization.

216835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2573.

The product of its digits is 1440, while the sum is 25.

The square root of 216835 is about 465.6554520243. The cubic root of 216835 is about 60.0772154019.

It can be divided in two parts, 2 and 16835, that multiplied together give a triangular number (33670 = T₂₅₉).

The spelling of 216835 in words is "two hundred sixteen thousand, eight hundred thirty-five".