216724271 has 2 divisors, whose sum is σ = 216724272. Its totient is φ = 216724270.

The previous prime is 216724267. The next prime is 216724283. The reversal of 216724271 is 172427612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216724271 - 2² = 216724267 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 (216724201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108362135 + 108362136.

It is an arithmetic number, because the mean of its divisors is an integer number (108362136).

Almost surely, 2^216724271 is an apocalyptic number.

216724271 is a deficient number, since it is larger than the sum of its proper divisors (1).

216724271 is an equidigital number, since it uses as much as digits as its factorization.

216724271 is an evil number, because the sum of its binary digits is even.

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

The square root of 216724271 is about 14721.5580357515. The cubic root of 216724271 is about 600.6698731346.

The spelling of 216724271 in words is "two hundred sixteen million, seven hundred twenty-four thousand, two hundred seventy-one".