15 minute dinners healthy triangular number, a hexagonal number, and a centered tetrahedral number. The number of partitions of 7. The smallest number that can be factorized using Shor’s quantum algorithm.

The magic constant of the unique order-3 normal magic square. The other such number is 13. The first 15 superabundant numbers are the same as the first 15 colossally abundant numbers. The only other number with this property is 27. If a positive definite quadratic form with integer matrix represents all positive integers up to 15, then it represents all positive integers via the 15 and 290 theorems.

There are 15 monohedral convex pentagonal tilings, with 8 being edge-to-edge. There are 15 Archimedean solids and 15 Catalan solids when enantiomorphic forms are counted separately. Seashells from the mollusk Donax variabilis have 15 coloring pattern phenotypes. Group 15 of the periodic table are sometimes known as the pnictogens. 15 Eunomia is the largest Eunomian asteroid in the inner asteroid belt. 112 is used in Pakistan, then the call is routed to 15.

112 can be used in an emergency even if the phone is locked and does not have a SIM card in it. In all four of the major Gaelic games—hurling, Gaelic football for men and women, and camogie—each team has 15 players on the field at any given time. In rugby union: Each team has 15 players on the field at any given time, unless one or more players are removed for a serious rules infraction. The jersey number 15 is worn by the starting fullback. In tennis, the number 15 represents the first point gained in a game. In NCAA Division I women’s college basketball, teams are allowed to provide scholarships to no more than 15 players at any given time. In Australian rules football, games in the AFL Women’s league consist of 15-minute quarters.