# 153 number

One hundred (and) fifty-three is the natural number following one hundred (and) fifty-two and preceding one hundred (and) fifty-four. As a triangular number, it is the sum of the first 17 integers, and also the sum of the first five factorials. (It is also a hexagonal number). It is a Harshad number. Since 153 = 1^3 + 5^3 + 3^3, it is a 3-narcissistic number, and it is a Friedman number since 153 = 3 * 51.

Evagrius Ponticus considered 153 to represent a harmonization of contrasts, since 153 = 100 + 28 + 25, with 100 representing a square, 28 a triangle and 25 a circle.

153
Ordinal153
Cardinal153rd
Factorization${\displaystyle 153=3^{2}\cdot 17}$
Roman numeralCLIII
Binary10011001