216384161 has 16 divisors (see below), whose sum is σ = 259219200. Its totient is φ = 176603328.

The previous prime is 216384139. The next prime is 216384163. The reversal of 216384161 is 161483612.

It is a cyclic number.

It is not a de Polignac number, because 216384161 - 2¹⁴ = 216367777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216384163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33935 + ... + 39803.

It is an arithmetic number, because the mean of its divisors is an integer number (16201200).

Almost surely, 2^216384161 is an apocalyptic number.

It is an amenable number.

216384161 is a deficient number, since it is larger than the sum of its proper divisors (42835039).

216384161 is a wasteful number, since it uses less digits than its factorization.

216384161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6128.

The product of its digits is 6912, while the sum is 32.

The square root of 216384161 is about 14710.0020734193. The cubic root of 216384161 is about 600.3554939614.

The spelling of 216384161 in words is "two hundred sixteen million, three hundred eighty-four thousand, one hundred sixty-one".