205516271 has 2 divisors, whose sum is σ = 205516272. Its totient is φ = 205516270.

The previous prime is 205516261. The next prime is 205516309. The reversal of 205516271 is 172615502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205516271 - 2²⁶ = 138407407 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205516211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102758135 + 102758136.

It is an arithmetic number, because the mean of its divisors is an integer number (102758136).

Almost surely, 2^205516271 is an apocalyptic number.

205516271 is a deficient number, since it is larger than the sum of its proper divisors (1).

205516271 is an equidigital number, since it uses as much as digits as its factorization.

205516271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 205516271 is about 14335.8386918938. The cubic root of 205516271 is about 590.1314185850.

The spelling of 205516271 in words is "two hundred five million, five hundred sixteen thousand, two hundred seventy-one".