205165711 has 2 divisors, whose sum is σ = 205165712. Its totient is φ = 205165710.

The previous prime is 205165637. The next prime is 205165729. The reversal of 205165711 is 117561502.

205165711 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205165711 - 2¹¹ = 205163663 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205165711.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205115711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102582855 + 102582856.

It is an arithmetic number, because the mean of its divisors is an integer number (102582856).

Almost surely, 2^205165711 is an apocalyptic number.

205165711 is a deficient number, since it is larger than the sum of its proper divisors (1).

205165711 is an equidigital number, since it uses as much as digits as its factorization.

205165711 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 205165711 is about 14323.6067734352. The cubic root of 205165711 is about 589.7956881383.

The spelling of 205165711 in words is "two hundred five million, one hundred sixty-five thousand, seven hundred eleven".