The number "Thirty" is an integer that comes after twenty-nine and before thirty-one. It is often represented as the numeral 30. In various cultures, the number thirty can symbolize a milestone, such as entering a new decade in life, often associated with turning thirty years old. In mathematics, thirty is an even number and can be divided by several integers, including 1, 2, 3, 5, 6, 10, 15, and 30 itself. It is also the product of the prime numbers 2, 3, and 5, making it a composite number. In Roman numerals, thirty is written as XXX.