206115016171 has 2 divisors, whose sum is σ = 206115016172. Its totient is φ = 206115016170.

The previous prime is 206115016139. The next prime is 206115016199. The reversal of 206115016171 is 171610511602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206115016171 - 2⁵ = 206115016139 is a prime.

It is not a weakly prime, because it can be changed into another prime (206115016571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103057508085 + 103057508086.

It is an arithmetic number, because the mean of its divisors is an integer number (103057508086).

Almost surely, 2^206115016171 is an apocalyptic number.

206115016171 is a deficient number, since it is larger than the sum of its proper divisors (1).

206115016171 is an equidigital number, since it uses as much as digits as its factorization.

206115016171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 31.

Adding to 206115016171 its reverse (171610511602), we get a palindrome (377725527773).

The spelling of 206115016171 in words is "two hundred six billion, one hundred fifteen million, sixteen thousand, one hundred seventy-one".