205241617267 has 2 divisors, whose sum is σ = 205241617268. Its totient is φ = 205241617266.

The previous prime is 205241617249. The next prime is 205241617309. The reversal of 205241617267 is 762716142502.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205241617267 is a prime.

It is not a weakly prime, because it can be changed into another prime (205241617067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102620808633 + 102620808634.

It is an arithmetic number, because the mean of its divisors is an integer number (102620808634).

Almost surely, 2^205241617267 is an apocalyptic number.

205241617267 is a deficient number, since it is larger than the sum of its proper divisors (1).

205241617267 is an equidigital number, since it uses as much as digits as its factorization.

205241617267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 43.

Adding to 205241617267 its reverse (762716142502), we get a palindrome (967957759769).

The spelling of 205241617267 in words is "two hundred five billion, two hundred forty-one million, six hundred seventeen thousand, two hundred sixty-seven".