206155005241 has 2 divisors, whose sum is σ = 206155005242. Its totient is φ = 206155005240.

The previous prime is 206155005239. The next prime is 206155005247. The reversal of 206155005241 is 142500551602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201224016400 + 4930988841 = 448580^2 + 70221^2 .

It is a cyclic number.

It is not a de Polignac number, because 206155005241 - 2¹ = 206155005239 is a prime.

Together with 206155005239, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (206155005247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103077502620 + 103077502621.

It is an arithmetic number, because the mean of its divisors is an integer number (103077502621).

Almost surely, 2^206155005241 is an apocalyptic number.

It is an amenable number.

206155005241 is a deficient number, since it is larger than the sum of its proper divisors (1).

206155005241 is an equidigital number, since it uses as much as digits as its factorization.

206155005241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 206155005241 its reverse (142500551602), we get a palindrome (348655556843).

The spelling of 206155005241 in words is "two hundred six billion, one hundred fifty-five million, five thousand, two hundred forty-one".