The number 231

Representation numerals
Greek numeral: σλαʹ
Arabic numeral: ٢٣١
Roman numeral: CCXXXI
Numeral systems
Binary: 11100111
Septimal (base 7): 450
Octal: 347
Hexadecimal: e7
Factorization
231 = 3 × 7 × 11
231 has 8 divisors: 1, 3, 7, 11, 21, 33, 77, 231
Sum of all divisors other than 231: 153
Sums & differences
Difference of 2 squares: 231 = 162 - 52 = 202 - 132 = 402 - 372 = 1162 - 1152
Characteristics
231 is a triangular number
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The next triangular is: 253
231 is a hexagonal number
Related primes
The 231th prime number is: 1453
Previous prime number: 229 — Next prime number: 233

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