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155 (number)

← 154 155 156 →
Cardinalone hundred fifty-five
Ordinal155th
(one hundred fifty-fifth)
Factorization5 × 31
Divisors1, 5, 31, 155
Greek numeralΡΝΕ´
Roman numeralCLV
Binary100110112
Ternary122023
Quaternary21234
Quinary11105
Senary4156
Octal2338
Duodecimal10B12
Hexadecimal9B16
Vigesimal7F20
Base 364B36

155 (one hundred [and] fifty-five) is the natural number following 154 and preceding 156.

In mathematics

155 is:

There are 155 primitive permutation groups of degree 81. OEISA000019

If one adds up all the primes from the least through the greatest prime factors of 155, that is, 5 and 31, the result is 155. (sequence A055233 in the OEIS) Only three other "small" semiprimes (10, 39, and 371) share this attribute.

In the military

In sports

In transportation

In other fields

155 is also:

See also

References

External links