216466161 has 16 divisors (see below), whose sum is σ = 296296704. Its totient is φ = 140505344.

The previous prime is 216466147. The next prime is 216466163. The reversal of 216466161 is 161664612.

It is a happy number.

216466161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 216466161 - 2²⁶ = 149357297 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216466163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23881 + ... + 31673.

It is an arithmetic number, because the mean of its divisors is an integer number (18518544).

Almost surely, 2^216466161 is an apocalyptic number.

It is an amenable number.

216466161 is a deficient number, since it is larger than the sum of its proper divisors (79830543).

216466161 is a wasteful number, since it uses less digits than its factorization.

216466161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8040.

The product of its digits is 10368, while the sum is 33.

The square root of 216466161 is about 14712.7890285969. The cubic root of 216466161 is about 600.4313204191.

The spelling of 216466161 in words is "two hundred sixteen million, four hundred sixty-six thousand, one hundred sixty-one".