33333333

33333333 is the eight-digit decimal integer in which every digit is the same: 3. In standard notation it equals 33,333,333. It can be expressed as 3 × 11,111,111 or as (10^8 − 1)/3. The number falls in the range of tens of millions and has a magnitude of about 3.33 × 10^7.

As a repdigit in base 10, it belongs to the class of numbers formed by repeating a single digit. The digit sum is 24, which makes the number divisible by 3 but not by 9; consequently, 33333333 is composite (it's 3 times 11,111,111).

Applications: It is occasionally used in examples and tests in programming, data formatting, and number theory demonstrations because its uniform digit pattern is easy to recognize and verify. In recreational mathematics, 33333333 is sometimes discussed alongside other repdigits such as 11111111 or 22222222. Related concepts include repdigits and repunits.