216032161 has 2 divisors, whose sum is σ = 216032162. Its totient is φ = 216032160.

The previous prime is 216032153. The next prime is 216032177. The reversal of 216032161 is 161230612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202891536 + 13140625 = 14244^2 + 3625^2 .

It is a cyclic number.

It is not a de Polignac number, because 216032161 - 2³ = 216032153 is a prime.

It is not a weakly prime, because it can be changed into another prime (216032111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108016080 + 108016081.

It is an arithmetic number, because the mean of its divisors is an integer number (108016081).

Almost surely, 2^216032161 is an apocalyptic number.

It is an amenable number.

216032161 is a deficient number, since it is larger than the sum of its proper divisors (1).

216032161 is an equidigital number, since it uses as much as digits as its factorization.

216032161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 216032161 is about 14698.0325554137. The cubic root of 216032161 is about 600.0297772259.

Adding to 216032161 its reverse (161230612), we get a palindrome (377262773).

The spelling of 216032161 in words is "two hundred sixteen million, thirty-two thousand, one hundred sixty-one".