2015

Previous  ... Next

Number

$2015$ (two thousand and fifteen) is:

$5 \times 13 \times 31$

The $3$rd Lucas-Carmichael number after $399$, $935$:

$\paren {5 + 1} \divides \paren {2015 + 1}$, $\paren {13 + 1} \divides \paren {2015 + 1}$, $\paren {31 + 1} \divides \paren {2015 + 1}$

The $3$rd term of the $3$rd triplet of consecutive positive integers all of which are sphenic:

$2013 = 3 \times 11 \times 61$, $2014 = 2 \times 19 \times 53$, $2015 = 5 \times 13 \times 31$

Also see

• Previous  ... Next: Lucas-Carmichael Number
• Previous  ... Next: Triples of Consecutive Sphenic Numbers