216085 has 8 divisors (see below), whose sum is σ = 270720. Its totient is φ = 165264.

The previous prime is 216071. The next prime is 216091. The reversal of 216085 is 580612.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 216085 - 2⁹ = 215573 is a prime.

It is a congruent 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, 825 + ... + 1054.

It is an arithmetic number, because the mean of its divisors is an integer number (33840).

216085 is a Friedman number, since it can be written as 85+60^(2+1), using all its digits and the basic arithmetic operations.

2²¹⁶⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

216085 is a deficient number, since it is larger than the sum of its proper divisors (54635).

216085 is a wasteful number, since it uses less digits than its factorization.

216085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 216085 is about 464.8494379904. The cubic root of 216085 is about 60.0078693382.

Adding to 216085 its reverse (580612), we get a palindrome (796697).

The spelling of 216085 in words is "two hundred sixteen thousand, eighty-five".