33333

33333 is a five-digit decimal numeral consisting of the digit 3 repeated five times. It is equal to 33333 in base 10 and is commonly used as an example in discussions of numerals, patterns, and arithmetic.

Mathematical properties: It equals 3 × 11111, where 11111 is the repunit with five ones, expressed as (10^5 − 1)/9. The prime factorization is 33333 = 3 × 41 × 271. Therefore the positive divisors are 1, 3, 41, 271, 123, 813, 11111, and 33333. The sum of its digits is 15, so the number is divisible by 3 but not by 9. The number is a palindrome and a repdigit—a number composed of identical digits.

In mathematics and computer science, repdigits such as 33333 are used as simple test values and for illustrating concepts such as divisibility and base representations. The number does not have widely known historical or cultural significance beyond these mathematical properties.