Number 561
The number 561 is the 33rd triangular number. It has 8 divisors and a digital root of 3. Explore its full properties below, or find words and phrases with a gematria value of 561.
561
Divisors: 8
1, 3, 11, 17, 33, 51, 187, 561
Sum: 864
Prev Triangular: 528
33rd Triangular Number
Next Triangular: 595
Mathematical Properties
Golden Numbern/a
Reduced Digit Sum3
Magic Constant88,279,521
Digital Root3
Octal369(1061)
Duodecimal793(3a9)
Hexadecimal1,377(231)
Binary1000110001
561st Values
Prime4,073
Triangular157,641
Square314,721
Star1,884,961
Pentagonal471,801
Cube176,558,481
Tetrahedral29,583,961
Square Pyramidal59,010,281
Fibonaccin/a
Harshad2,889
Happy Number3,736