2220

2220 = 2 x 2 x 3 x 5 x 37.

2220 is a divisor of 31⁴ - 1.

2220 is a multiple of six and the sum of its digits is also six (A062768).

2220 is the sum of even numbers in the range 440 to 449 (A053741).

2220 is the number of partitions of 3⁶ into powers of 6 (A196884).

2220 is a year in which the month of February has five Tuesdays (A143994).

Source: On-Line Encyclopedia of Integer Sequences