195 (one hundred
ndninety-five) is the
natural number
In mathematics, the natural numbers are the numbers 0, 1, 2, 3, and so on, possibly excluding 0. Some start counting with 0, defining the natural numbers as the non-negative integers , while others start with 1, defining them as the positive in ...
following
194 and preceding
196.
In mathematics
195 is:
* the sum of eleven consecutive primes:
3 +
5 +
7 +
11 +
13 +
17 +
19 +
23 +
29 +
31 +
37
* the smallest number expressed as a sum of distinct
square
In geometry, a square is a regular polygon, regular quadrilateral. It has four straight sides of equal length and four equal angles. Squares are special cases of rectangles, which have four equal angles, and of rhombuses, which have four equal si ...
s in 16 different ways
* a
centered tetrahedral number
* in the middle of a
prime quadruplet (191, 193, 197, 199).
See also
*
195 (disambiguation)
References
Integers
{{Num-stub