206065342181 has 2 divisors, whose sum is σ = 206065342182. Its totient is φ = 206065342180.

The previous prime is 206065342159. The next prime is 206065342183. The reversal of 206065342181 is 181243560602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206029749025 + 35593156 = 453905^2 + 5966^2 .

It is a cyclic number.

It is not a de Polignac number, because 206065342181 - 2²⁶ = 205998233317 is a prime.

It is a super-2 number, since 2×206065342181² (a number of 23 digits) contains 22 as substring.

Together with 206065342183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206065342183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103032671090 + 103032671091.

It is an arithmetic number, because the mean of its divisors is an integer number (103032671091).

Almost surely, 2^206065342181 is an apocalyptic number.

It is an amenable number.

206065342181 is a deficient number, since it is larger than the sum of its proper divisors (1).

206065342181 is an equidigital number, since it uses as much as digits as its factorization.

206065342181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 206065342181 in words is "two hundred six billion, sixty-five million, three hundred forty-two thousand, one hundred eighty-one".