216612105 has 16 divisors (see below), whose sum is σ = 346850304. Its totient is φ = 115436160.

The previous prime is 216612083. The next prime is 216612119. The reversal of 216612105 is 501216612.

216612105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216612105 - 2²⁰ = 215563529 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17157 + ... + 26973.

It is an arithmetic number, because the mean of its divisors is an integer number (21678144).

Almost surely, 2^216612105 is an apocalyptic number.

It is an amenable number.

216612105 is a deficient number, since it is larger than the sum of its proper divisors (130238199).

216612105 is a wasteful number, since it uses less digits than its factorization.

216612105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11296.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 216612105 is about 14717.7479595215. The cubic root of 216612105 is about 600.5662293613.

Adding to 216612105 its reverse (501216612), we get a palindrome (717828717).

The spelling of 216612105 in words is "two hundred sixteen million, six hundred twelve thousand, one hundred five".