Number 15 — Fifteen

The number 15 is written with one or two Western digits from the Hindu–Arabic numeral system. It is odd and composite. Its positive divisors are 1, 3, 5, 15. Additional properties include being a triangular number. These mathematical properties are verifiable; religious, esoteric, and numerological readings depend on a particular tradition and are not properties of the number itself. Numerological reading: the number is associated with magnetism, desire, and the trial of matter. In a talismanic or meditative composition it may express an intention to focus on these qualities; meanings vary by school and context.