2218171 has 2 divisors, whose sum is σ = 2218172. Its totient is φ = 2218170.

The previous prime is 2218157. The next prime is 2218199. The reversal of 2218171 is 1718122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2218171 - 2¹³ = 2209979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2218121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109085 + 1109086.

It is an arithmetic number, because the mean of its divisors is an integer number (1109086).

2^2218171 is an apocalyptic number.

2218171 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218171 is an equidigital number, since it uses as much as digits as its factorization.

2218171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 224, while the sum is 22.

The square root of 2218171 is about 1489.3525438928. The cubic root of 2218171 is about 130.4162398069.

The spelling of 2218171 in words is "two million, two hundred eighteen thousand, one hundred seventy-one".