206061181 has 2 divisors, whose sum is σ = 206061182. Its totient is φ = 206061180.

The previous prime is 206061179. The next prime is 206061187. The reversal of 206061181 is 181160602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205664281 + 396900 = 14341^2 + 630^2 .

It is a cyclic number.

It is not a de Polignac number, because 206061181 - 2¹ = 206061179 is a prime.

It is a super-2 number, since 2×206061181² = 84922420630229522, which contains 22 as substring.

Together with 206061179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206061187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103030590 + 103030591.

It is an arithmetic number, because the mean of its divisors is an integer number (103030591).

Almost surely, 2^206061181 is an apocalyptic number.

It is an amenable number.

206061181 is a deficient number, since it is larger than the sum of its proper divisors (1).

206061181 is an equidigital number, since it uses as much as digits as its factorization.

206061181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 206061181 is about 14354.8312773087. The cubic root of 206061181 is about 590.6525204313.

The spelling of 206061181 in words is "two hundred six million, sixty-one thousand, one hundred eighty-one".