number.wiki
Number

87,221

87,221 is a prime, odd.

Deficient Number Prime Squarefree Twin Prime

Properties

Parity
Odd
Digit count
5
Digit sum
20
Digital root
2
Palindrome
No
Divisor count
2
σ(n) — sum of divisors
87,222

Primality

87,221 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)
1 · 87221
Aliquot sum (sum of proper divisors): 1
Factor pairs (a × b = 87,221)
1 × 87221
First multiples
87,221 · 174,442 · 261,663 · 348,884 · 436,105 · 523,326 · 610,547 · 697,768 · 784,989 · 872,210

Representations

In words
eighty-seven thousand two hundred twenty-one
Ordinal
87221st
Binary
10101010010110101
Octal
252265
Hexadecimal
154B5

Also seen as

Prime neighborhood

Adjacent primes:

  • Previous prime: 87,211 (gap of 10)
  • Next prime: 87,223 (gap of 2)

Pair status: twin with 87223.

Hex color
#0154B5
RGB(1, 84, 181)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.1.84.181.