195 (number)
Encyclopedia : 1 : 19 : 195 : 195 (number)
195 is the natural number following 194 and preceding 196.
| |||
| Ordinal | One hundred [and] ninety-five | ||
| Cardinal | 195th | ||
| Factorization | [3 \cdot 5 \cdot 13] | ||
| Roman numeral | CXCV | ||
| Binary | 11000011 | ||
| Hexadecimal | C3 | ||
195 is a sphenic number, coming in the middle of the prime quadruplet 191, 193, 197 and 199. 195 is the sum of eleven consecutive primes (3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 + 29 + 31 + 37). Although not itself prime, 195 passes through Ulam's sieve and thus is a lucky number. The smallest number that can be expressed as a sum of distinct squares in 16 different ways is 195 (sequence in OEIS). 195 is a Harshad number.
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