205136411 has 2 divisors, whose sum is σ = 205136412. Its totient is φ = 205136410.

The previous prime is 205136387. The next prime is 205136413. The reversal of 205136411 is 114631502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205136411 is a prime.

Together with 205136413, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (205136413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102568205 + 102568206.

It is an arithmetic number, because the mean of its divisors is an integer number (102568206).

Almost surely, 2^205136411 is an apocalyptic number.

205136411 is a deficient number, since it is larger than the sum of its proper divisors (1).

205136411 is an equidigital number, since it uses as much as digits as its factorization.

205136411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 205136411 is about 14322.5839498325. The cubic root of 205136411 is about 589.7676102880.

Adding to 205136411 its reverse (114631502), we get a palindrome (319767913).

The spelling of 205136411 in words is "two hundred five million, one hundred thirty-six thousand, four hundred eleven".