Welcome to the dictionary of numbers

This page will tell you almost everything that it is necessary to know about number: 15
Let's begin with a basic information:

Number 15

Structure

Number 15 has 2 figures which are brought to 6. In English it sounds so: fifteen. Besides, the numbers representing number 15 are: one, five.
Number 15 - decimal number which means that on the basis 10. 15 can be also presented in different bases, such as the Binary system of calculation also looks: 1111, the Octal system of an calculation also, also looks as and 16, in Hexadecimal system of calculation and looks as follows: . 15 The number in the triple system of reference looks like: in fourfold: 33 in pyatirichoy: in shestirichnoy: 23 in the septenary: . Also the number of number systems in from 4 to 34.

Characteristic

Number 15 is Positive and Odd. His inverse number 0,066666666666667 and negative number -15. Number 15 can be divided on 1, 3, 5, 15 without the rest. Besides, it is not an ideal square, and it not a prime number. Now let's use trigonometrical functions. By means of sinusoidal function: Sin(15°) gives 0,65, using function of the Cosine of the cos function (15°) gives -0,76 and through the Tangent the tan function(15°) is made by -0,856. Arctangent number is 15 1,504, area of ​​a circle of radius equal to 15 706,858 exponent in powers of 15 is 3269017,372.
Previous number: 14
Binary (base two): 1111
Number (base 4): 33
Number (base 6): 23
Number (base 8): 17
Number (base 10): 15
Number (base 12): 13
Number (base 14): 11
Number (base 16): f
Number (base 18): f
Number (base 20): f
Number (base 22): f
Number (base 24): f
Number (base 26): f
Number (base 28): f
Number (base 30): f
Number (base 32): f
Number (base 34): f
Inverse: 0,066666666666667
Counter: -15
Divisible by: 1, 3, 5, 15
Factorial number: 1307674368000
Number of digits: 2
Sum of digits: 6
Product of digits: 5
15 radian is equal (degree): 859,437
Next number: 16
Number (base 3): 120
Number (base 5): 30
Number (base 7): 21
Number (base 9): 16
Number (base 11): 14
Number (base 13): 12
Number (base 15): 10
Number (base 17): f
Number (base 19): f
Number (base 21): f
Number (base 23): f
Number (base 25): f
Number (base 27): f
Number (base 29): f
Number (base 31): f
Number (base 33): f
Even / Odd: Odd
Unix Timestamp: Thu Jan 01 00:00:15 1970
Perfect square: NO
Prime: NO
Positive / Negative: Positive
English: fifteen
English digits: one, five
Sin: 0,65
Cos: -0,76
Tan: -0,856
Atan: 1,504
Area of a circle r= 15: 706,858
exhibitor (degree 15): 3269017,372