216560171 has 2 divisors, whose sum is σ = 216560172. Its totient is φ = 216560170.

The previous prime is 216560159. The next prime is 216560177. The reversal of 216560171 is 171065612.

216560171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216560171 - 2¹⁴ = 216543787 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216560177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108280085 + 108280086.

It is an arithmetic number, because the mean of its divisors is an integer number (108280086).

Almost surely, 2^216560171 is an apocalyptic number.

216560171 is a deficient number, since it is larger than the sum of its proper divisors (1).

216560171 is an equidigital number, since it uses as much as digits as its factorization.

216560171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 216560171 is about 14715.9835213281. The cubic root of 216560171 is about 600.5182291206.

The spelling of 216560171 in words is "two hundred sixteen million, five hundred sixty thousand, one hundred seventy-one".