# 171 (number)

 ← 170 171 172 →
Cardinalone hundred seventy-one
Ordinal171st
(one hundred seventy-first)
Factorization32× 19
Divisors1, 3, 9, 19, 57, 171
Greek numeralΡΟΑ´
Roman numeralCLXXI
Binary101010112
Ternary201003
Quaternary22234
Quinary11415
Senary4436
Octal2538
Duodecimal12312
Vigesimal8B20
Base 364R36

171 (one hundred [and] seventy-one) is the natural number following 170 and preceding 172.

## In mathematics

171 is an odd number, a composite number, and a deficient number. It is also a triangular number, a tridecagonal number[1] and a 58-gonal number.

171 is a Harshad number, a palindromic number, and an undulating number. 171 is a repdigit in base 7 (333), and also in bases 18, 56, and 170.

171 is also: