206731241 has 2 divisors, whose sum is σ = 206731242. Its totient is φ = 206731240.

The previous prime is 206731223. The next prime is 206731249. The reversal of 206731241 is 142137602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202236841 + 4494400 = 14221^2 + 2120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206731241 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206731241.

It is not a weakly prime, because it can be changed into another prime (206731249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103365620 + 103365621.

It is an arithmetic number, because the mean of its divisors is an integer number (103365621).

Almost surely, 2^206731241 is an apocalyptic number.

It is an amenable number.

206731241 is a deficient number, since it is larger than the sum of its proper divisors (1).

206731241 is an equidigital number, since it uses as much as digits as its factorization.

206731241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 206731241 is about 14378.1515154070. The cubic root of 206731241 is about 591.2920463791.

Adding to 206731241 its reverse (142137602), we get a palindrome (348868843).

The spelling of 206731241 in words is "two hundred six million, seven hundred thirty-one thousand, two hundred forty-one".