| ||||
|---|---|---|---|---|
| Cardinal | one hundred fifteen | |||
| Ordinal | 115th (one hundred fifteenth) | |||
| Factorization | 5 × 23 | |||
| Divisors | 1, 5, 23, 115 | |||
| Greek numeral | ΡΙΕ´ | |||
| Roman numeral | CXV | |||
| Binary | 11100112 | |||
| Ternary | 110213 | |||
| Senary | 3116 | |||
| Octal | 1638 | |||
| Duodecimal | 9712 | |||
| Hexadecimal | 7316 | |||
115 (one hundred [and] fifteen) is the natural number following 114 and preceding 116.
115 has a square sum of divisors: [1]
There are 115 different rooted trees with exactly eight nodes, [2] 115 inequivalent ways of placing six rooks on a 6 × 6 chess board in such a way that no two of the rooks attack each other, [3] and 115 solutions to the stamp folding problem for a strip of seven stamps. [4]
115 is also a heptagonal pyramidal number. [5] The 115th Woodall number,
is a prime number. [6] 115 is the sum of the first five heptagonal numbers.
10 (ten) is the even natural number following 9 and preceding 11. Ten is the base of the decimal numeral system, the most common system of denoting numbers in both spoken and written language.
34 (thirty-four) is the natural number following 33 and preceding 35.
55 (fifty-five) is the natural number following 54 and preceding 56.
1000 or one thousand is the natural number following 999 and preceding 1001. In most English-speaking countries, it can be written with or without a comma or sometimes a period separating the thousands digit: 1,000.
300 is the natural number following 299 and preceding 301.
700 is the natural number following 699 and preceding 701.
800 is the natural number following 799 and preceding 801.
900 is the natural number following 899 and preceding 901. It is the square of 30 and the sum of Euler's totient function for the first 54 positive integers. In base 10 it is a Harshad number. It is also the first number to be the square of a sphenic number.
2000 is a natural number following 1999 and preceding 2001.
3000 is the natural number following 2999 and preceding 3001. It is the smallest number requiring thirteen letters in English.
4000 is the natural number following 3999 and preceding 4001. It is a decagonal number.
135 is the natural number following 134 and preceding 136.
1,000,000,000 is the natural number following 999,999,999 and preceding 1,000,000,001. With a number, "billion" can be abbreviated as b, bil or bn.
100,000 (one hundred thousand) is the natural number following 99,999 and preceding 100,001. In scientific notation, it is written as 105.
177 is the natural number following 176 and preceding 178.
252 is the natural number following 251 and preceding 253.
288 is the natural number following 287 and preceding 289. Because 288 = 2 · 12 · 12, it may also be called "two gross" or "two dozen dozen".
20,000 is the natural number that comes after 19,999 and before 20,001.
40,000 is the natural number that comes after 39,999 and before 40,001. It is the square of 200.
888 is the natural number following 887 and preceding 889.
