2078218171 has 2 divisors, whose sum is σ = 2078218172. Its totient is φ = 2078218170.

The previous prime is 2078218151. The next prime is 2078218187. The reversal of 2078218171 is 1718128702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2078218171 - 2¹¹ = 2078216123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2078218171.

It is not a weakly prime, because it can be changed into another prime (2078218111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1039109085 + 1039109086.

It is an arithmetic number, because the mean of its divisors is an integer number (1039109086).

Almost surely, 2^2078218171 is an apocalyptic number.

2078218171 is a deficient number, since it is larger than the sum of its proper divisors (1).

2078218171 is an equidigital number, since it uses as much as digits as its factorization.

2078218171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12544, while the sum is 37.

The square root of 2078218171 is about 45587.4782259339. The cubic root of 2078218171 is about 1276.1362514316.

The spelling of 2078218171 in words is "two billion, seventy-eight million, two hundred eighteen thousand, one hundred seventy-one".