216106 has 24 divisors (see below), whose sum is σ = 383040. Its totient is φ = 91080.

The previous prime is 216103. The next prime is 216107. The reversal of 216106 is 601612.

It is a self number, because there is not a number n which added to its sum of digits gives 216106.

It is not an unprimeable number, because it can be changed into a prime (216103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4575 + ... + 4621.

It is an arithmetic number, because the mean of its divisors is an integer number (15960).

2²¹⁶¹⁰⁶ is an apocalyptic number.

216106 is a deficient number, since it is larger than the sum of its proper divisors (166934).

216106 is a wasteful number, since it uses less digits than its factorization.

216106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 216106 is about 464.8720254005. The cubic root of 216106 is about 60.0098132097.

Adding to 216106 its reverse (601612), we get a palindrome (817718).

The spelling of 216106 in words is "two hundred sixteen thousand, one hundred six".