155 (number)
155 (one hundred fifty-five) is a natural number. It comes after 154 and before 156.
| ||||
|---|---|---|---|---|
| Cardinal | one hundred and fifty-five | |||
| Ordinal | 155th (one hundred and fifty-fifth) | |||
| Factorization | 5 · 31 | |||
| Roman numeral | CLV | |||
| Binary | 100110112 | |||
| Ternary | 122023 | |||
| Quaternary | 21234 | |||
| Quinary | 11105 | |||
| Senary | 4156 | |||
| Octal | 2338 | |||
| Duodecimal | 10B12 | |||
| Hexadecimal | 9B16 | |||
| Vigesimal | 7F20 | |||
| Base 36 | 4B36 | |||
In mathematics
- 155 is a semiprime number. This means it is the product of two prime numbers. Its prime factorization is:
155=5×31
- In Roman numerals, 155 is written as CLV.
Other facts
- 155 is the police emergency telephone number in Turkey.
- The year AD 155 was a year in the Julian calendar (used in ancient Rome). It was the year after AD 154 and before AD 156.