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131,000

131,000 is a composite number, even.

This number doesn't have a permanent NumberWiki page yet — what you see below is computed live. Pages get added to the permanent index when they're notable (years, primes, curated, etc.).
Abundant Number Gapful Number Harshad / Niven Odious Number Pernicious Number Practical Number Semiperfect Number

Interestingness

★ ★ ☆ ☆ ☆
4 notable facts · grade D
130,988 130,989 130,990 130,991 130,992 130,993 130,994 130,995 130,996 130,997 130,998 130,999 131,000 131,001 131,002 131,003 131,004 131,005 131,006 131,007 131,008 131,009 131,010 131,011 131,012
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Properties

Parity
Even
Digit count
6
Digit sum
5
Digit product
0
Digital root
5
Palindrome
No
Bit width
17 bits
Reversed
131
Square (n²)
17,161,000,000
Cube (n³)
2,248,091,000,000,000
Divisor count
32
σ(n) — sum of divisors
308,880
φ(n) — Euler's totient
52,000
Sum of prime factors
152

Primality

Prime factorization: 2 3 × 5 3 × 131

Nearest primes: 130,987 (−13) · 131,009 (+9)

Divisors & multiples

All divisors (32)
1 · 2 · 4 · 5 · 8 · 10 · 20 · 25 · 40 · 50 · 100 · 125 · 131 · 200 · 250 · 262 · 500 · 524 · 655 · 1000 · 1048 · 1310 · 2620 · 3275 · 5240 · 6550 · 13100 · 16375 · 26200 · 32750 · 65500 (half) · 131000
Aliquot sum (sum of proper divisors): 177,880
Factor pairs (a × b = 131,000)
1 × 131000
2 × 65500
4 × 32750
5 × 26200
8 × 16375
10 × 13100
20 × 6550
25 × 5240
40 × 3275
50 × 2620
100 × 1310
125 × 1048
131 × 1000
200 × 655
250 × 524
262 × 500
First multiples
131,000 · 262,000 (double) · 393,000 · 524,000 · 655,000 · 786,000 · 917,000 · 1,048,000 · 1,179,000 · 1,310,000

Sums & aliquot sequence

As consecutive integers: 26,198 + 26,199 + 26,200 + 26,201 + 26,202 8,180 + 8,181 + … + 8,195 5,228 + 5,229 + … + 5,252 1,598 + 1,599 + … + 1,677
Aliquot sequence: 131,000 → 177,880 → 222,440 → 291,640 → 395,240 → 519,520 → 786,848 → 789,664 → 765,050 → 922,342 → 461,174 → 329,434 → 235,334 → 170,746 → 89,894 → 64,234 → 32,120 — unresolved within range

Continued fraction of √n

√131,000 = [361; (1, 15, 2, 4, 1, 5, 6, 14, 1, 1, 1, 1, 3, 28, 1, 2, 9, 1, 6, 17, 1, 1, 22, 1, …)]

Representations

In words
one hundred thirty-one thousand
Ordinal
131000th
Binary
11111111110111000
Octal
377670
Hexadecimal
0x1FFB8
Base64
Af+4
One's complement
4,294,836,295 (32-bit)
Scientific notation
1.31 × 10⁵
As a duration
131,000 s = 1 day, 12 hours, 23 minutes, 20 seconds
In other bases
ternary (3) 20122200212
quaternary (4) 133332320
quinary (5) 13143000
senary (6) 2450252
septenary (7) 1053632
nonary (9) 218625
undecimal (11) 8a471
duodecimal (12) 63988
tridecimal (13) 4781c
tetradecimal (14) 35a52
pentadecimal (15) 28c35

Historical numeral systems

Babylonian (base 60)
𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹 𒌋𒌋
Egyptian hieroglyphic
𓆐𓂍𓂍𓂍𓆼
Greek (Milesian)
͵ρλα
Mayan (base 20)
𝋰·𝋧·𝋪·𝋠
Chinese
一十三萬一千
Chinese (financial)
壹拾參萬壹仟
In other modern scripts
Eastern Arabic ١٣١٠٠٠ Devanagari १३१००० Bengali ১৩১০০০ Tamil ௧௩௧௦௦௦ Thai ๑๓๑๐๐๐ Tibetan ༡༣༡༠༠༠ Khmer ១៣១០០០ Lao ໑໓໑໐໐໐ Burmese ၁၃၁၀၀၀

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 131000, here are decompositions:

  • 13 + 130987 = 131000
  • 19 + 130981 = 131000
  • 31 + 130969 = 131000
  • 43 + 130957 = 131000
  • 73 + 130927 = 131000
  • 127 + 130873 = 131000
  • 157 + 130843 = 131000
  • 193 + 130807 = 131000

Showing the first eight; more decompositions exist.

Hex color
#01FFB8
RGB(1, 255, 184)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.1.255.184.

Address
0.1.255.184
Class
reserved
IPv4-mapped IPv6
::ffff:0.1.255.184

Unspecified address (0.0.0.0/8) — "this network" placeholder.

Possible US patent number

This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 131,000 and was likely granted around 1872.

Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.

Look up US131,000 on Google Patents ↗ Look up on USPTO ↗
Position in π

The digit sequence 131000 first appears in π at position 637,657 of the decimal expansion (the 637,657ordinal-suffix:th digit after the integer 3).

Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.

Look up 131000 on Pi Search ↗