205151171 has 2 divisors, whose sum is σ = 205151172. Its totient is φ = 205151170.

The previous prime is 205151159. The next prime is 205151173. The reversal of 205151171 is 171151502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205151171 is a prime.

Together with 205151173, 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 (205151173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102575585 + 102575586.

It is an arithmetic number, because the mean of its divisors is an integer number (102575586).

Almost surely, 2^205151171 is an apocalyptic number.

205151171 is a deficient number, since it is larger than the sum of its proper divisors (1).

205151171 is an equidigital number, since it uses as much as digits as its factorization.

205151171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 350, while the sum is 23.

The square root of 205151171 is about 14323.0992107155. The cubic root of 205151171 is about 589.7817549590.

The spelling of 205151171 in words is "two hundred five million, one hundred fifty-one thousand, one hundred seventy-one".