271

Number
$271$ (two hundred and seventy-one) is:


 * The $58$th prime number


 * The $2$nd of the $18$th pair of twin primes, with $269$


 * The $10$th centered hexagonal number after $1, 7, 19, 37, 61, 91, 127, 169, 217$:
 * $271 = 1 + 6 + 12 + 18 + 24 + 30 + 36 + 42 + 48 + 54 = 10^3 - 9^3$


 * The $12$th of $29$ primes of the form $2 x^2 + 29$:
 * $2 \times 11^2 + 29 = 271$