206030444261 has 2 divisors, whose sum is σ = 206030444262. Its totient is φ = 206030444260.

The previous prime is 206030444209. The next prime is 206030444309. The reversal of 206030444261 is 162444030602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160392240100 + 45638204161 = 400490^2 + 213631^2 .

It is a cyclic number.

It is not a de Polignac number, because 206030444261 - 2³⁰ = 204956702437 is a prime.

It is a super-2 number, since 2×206030444261² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206030444461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103015222130 + 103015222131.

It is an arithmetic number, because the mean of its divisors is an integer number (103015222131).

Almost surely, 2^206030444261 is an apocalyptic number.

It is an amenable number.

206030444261 is a deficient number, since it is larger than the sum of its proper divisors (1).

206030444261 is an equidigital number, since it uses as much as digits as its factorization.

206030444261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 206030444261 its reverse (162444030602), we get a palindrome (368474474863).

The spelling of 206030444261 in words is "two hundred six billion, thirty million, four hundred forty-four thousand, two hundred sixty-one".