2172216271 has 2 divisors, whose sum is σ = 2172216272. Its totient is φ = 2172216270.

The previous prime is 2172216223. The next prime is 2172216281. The reversal of 2172216271 is 1726122712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2172216271 - 2⁷ = 2172216143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2172216281) 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, 1086108135 + 1086108136.

It is an arithmetic number, because the mean of its divisors is an integer number (1086108136).

Almost surely, 2^2172216271 is an apocalyptic number.

2172216271 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172216271 is an equidigital number, since it uses as much as digits as its factorization.

2172216271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 31.

The square root of 2172216271 is about 46607.0410024065. The cubic root of 2172216271 is about 1295.0931932555.

Adding to 2172216271 its reverse (1726122712), we get a palindrome (3898338983).

The spelling of 2172216271 in words is "two billion, one hundred seventy-two million, two hundred sixteen thousand, two hundred seventy-one".