206081 has 2 divisors, whose sum is σ = 206082. Its totient is φ = 206080.

The previous prime is 206077. The next prime is 206083. The reversal of 206081 is 180602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172225 + 33856 = 415^2 + 184^2 .

It is a cyclic number.

It is not a de Polignac number, because 206081 - 2² = 206077 is a prime.

It is a super-2 number, since 2×206081² = 84938757122, which contains 22 as substring.

Together with 206083, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (206083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103040 + 103041.

It is an arithmetic number, because the mean of its divisors is an integer number (103041).

2²⁰⁶⁰⁸¹ is an apocalyptic number.

It is an amenable number.

206081 is a deficient number, since it is larger than the sum of its proper divisors (1).

206081 is an equidigital number, since it uses as much as digits as its factorization.

206081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 206081 is about 453.9614521080. The cubic root of 206081 is about 59.0671456178.

Adding to 206081 its reverse (180602), we get a palindrome (386683).

The spelling of 206081 in words is "two hundred six thousand, eighty-one".