Thirtythree

Thirtythree is the integer 33. In standard English, the number is usually written as thirty-three, with the hyphen, and the word form stands between thirty-two and thirty-four. The compound form “thirtythree” may appear as a stylized name or in specialized contexts, but numerically 33 is the same value.

Etymology and naming. The term derives from the words for “three” and “ten,” reflecting its position as three tens plus three. The English word thirty comes from Old English thrītig, meaning three tens; adding the numeral three yields thirty-three.

In mathematics, 33 is an odd composite number with prime factorization 3 × 11. It is a semiprime, being the product of two distinct primes. The digits sum to 6, and it is divisible by 3 and 11. It is the 11th composite number and appears in various number-theory contexts, including factorization patterns and arithmetic sequences.

Cultural and historical associations. In Freemasonry, the 33rd degree is recognized as the highest degree of the Scottish Rite, conferred as an honorary rank in many jurisdictions. In Christian tradition, some sources hold that Jesus was crucified at age 33, a figure repeated in popular culture though not universally asserted as a historical fact. The number also features in various calendars, anniversaries, and symbolic systems.

Astronomy and science. Messier 33, or M33, is the Triangulum Galaxy, a spiral galaxy in the constellation Triangulum and a member of the Local Group. It is one of the nearest spiral galaxies to the Milky Way and is a frequent object of astronomical study.

Media and technology. The number appears in popular culture as the title of the 2015 film The 33, which depicts the 2010 Chilean mining disaster. In music and media, 33⅓ rpm designates the standard rotational speed of long-playing vinyl records. In computing, the decimal code 33 represents the exclamation mark (!) in ASCII.