number.wiki
Number

8,191

8,191 is a prime, odd.

Deficient Number Mersenne Prime Prime Squarefree

Properties

Parity
Odd
Digit count
4
Digit sum
19
Digital root
1
Palindrome
No
Divisor count
2
σ(n) — sum of divisors
8,192

Primality

8,191 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)
1 · 8191
Aliquot sum (sum of proper divisors): 1
Factor pairs (a × b = 8,191)
1 × 8191
First multiples
8,191 · 16,382 · 24,573 · 32,764 · 40,955 · 49,146 · 57,337 · 65,528 · 73,719 · 81,910

Representations

In words
eight thousand one hundred ninety-one
Ordinal
8191st
Binary
1111111111111
Octal
17777
Hexadecimal
1FFF

Also seen as

Prime neighborhood

Adjacent primes:

  • Previous prime: 8,179 (gap of 12)
  • Next prime: 8,209 (gap of 18)
Hex color
#001FFF
RGB(0, 31, 255)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.31.255.