216000161 has 8 divisors (see below), whose sum is σ = 236088384. Its totient is φ = 196408080.

The previous prime is 216000139. The next prime is 216000179. The reversal of 216000161 is 161000612.

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 216000161 - 2²⁶ = 148891297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216000101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123125 + ... + 124866.

It is an arithmetic number, because the mean of its divisors is an integer number (29511048).

Almost surely, 2^216000161 is an apocalyptic number.

It is an amenable number.

216000161 is a deficient number, since it is larger than the sum of its proper divisors (20088223).

216000161 is a wasteful number, since it uses less digits than its factorization.

216000161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248071.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 216000161 is about 14696.9439340293. The cubic root of 216000161 is about 600.0001490740. Note that the first 3 decimals are identical.

Adding to 216000161 its reverse (161000612), we get a palindrome (377000773).

The spelling of 216000161 in words is "two hundred sixteen million, one hundred sixty-one", and thus it is an aban number.