333333

333,333 is the six-digit integer formed by the digit 3 repeated six times in decimal notation. It is a repdigit and palindromic, since it reads the same forward and backward. The number lies between 333,332 and 333,334.

In arithmetic, 333,333 is divisible by 3 and 9, as the sum of its digits is 18. It is not a prime number. Its prime factorization is 3^2 × 7 × 11 × 13 × 37, and it equals one third of 999,999.

In other contexts, the pattern 333333 is used in puzzles and demonstrations of divisibility. The sequence is also common in discussions of repdigits and base-10 arithmetic.

In web design, the hex color code #333333 represents a dark gray color with RGB values (51, 51, 51).