216169271 has 2 divisors, whose sum is σ = 216169272. Its totient is φ = 216169270.

The previous prime is 216169243. The next prime is 216169273. The reversal of 216169271 is 172961612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216169271 - 2¹⁰ = 216168247 is a prime.

Together with 216169273, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216169273) 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 as a sum of consecutive naturals, namely, 108084635 + 108084636.

It is an arithmetic number, because the mean of its divisors is an integer number (108084636).

Almost surely, 2^216169271 is an apocalyptic number.

216169271 is a deficient number, since it is larger than the sum of its proper divisors (1).

216169271 is an equidigital number, since it uses as much as digits as its factorization.

216169271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 216169271 is about 14702.6960452837. The cubic root of 216169271 is about 600.1566914835.

The spelling of 216169271 in words is "two hundred sixteen million, one hundred sixty-nine thousand, two hundred seventy-one".