216271247 has 2 divisors, whose sum is σ = 216271248. Its totient is φ = 216271246.

The previous prime is 216271207. The next prime is 216271259. The reversal of 216271247 is 742172612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216271247 - 2¹² = 216267151 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216271207) 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 as a sum of consecutive naturals, namely, 108135623 + 108135624.

It is an arithmetic number, because the mean of its divisors is an integer number (108135624).

Almost surely, 2^216271247 is an apocalyptic number.

216271247 is a deficient number, since it is larger than the sum of its proper divisors (1).

216271247 is an equidigital number, since it uses as much as digits as its factorization.

216271247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 32.

The square root of 216271247 is about 14706.1635717817. The cubic root of 216271247 is about 600.2510495718.

The spelling of 216271247 in words is "two hundred sixteen million, two hundred seventy-one thousand, two hundred forty-seven".