315 = (4 + 3) × (4 + 1) × (4 + 5).
3152 = 253 + 263 + 273 + 283 + 293 = 99,225.
315 is a divisor of 642 - 1.
315 is a number divisible by each of its digits.
315 is the telephone area code for Syracuse, New York.
Source: What’s Special About This Number?
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