516

516 = 2² x 3 x 43.

516 is the number of partitions of 32 in which no part occurs only once.

516 is the sum of two distinct powers of 2: 516 = 2⁹ + 2².

516 is a refactorable number. The number of divisors (4) of 516 divides 516.

The digit 6 occurs in the 516th position in the decimal expansion of pi.

516 are the first three digits in the Dewey Decimal Classification System call numbers for library books in geometry.

Source: What's Special About This Number?