Live analysis

31,531,001

31,531,001 is a prime, odd.

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.).

31,531,001 (thirty-one million five hundred thirty-one thousand one) is an odd 8-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x1E11FF9.

Arithmetic Number Chen Prime Cube-Free Deficient Number Evil Number Prime Pythagorean Prime Sophie Germain Prime Squarefree

Interestingness

★ ★ ★ ★ ☆

7 notable facts · grade B

31,530,989 31,530,990 31,530,991 31,530,992 31,530,993 31,530,994 31,530,995 31,530,996 31,530,997 31,530,998 31,530,999 31,531,000 31,531,001 31,531,002 31,531,003 31,531,004 31,531,005 31,531,006 31,531,007 31,531,008 31,531,009 31,531,010 31,531,011 31,531,012 31,531,013

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Properties

Parity: Odd
Digit count: 8
Digit sum: 14
Digit product: 0
Digital root: 5
Palindrome: No
Bit width: 25 bits
Reversed: 10,013,513
Square (n²): 994,204,024,062,001
Divisor count: 2
σ(n) — sum of divisors: 31,531,002
φ(n) — Euler's totient: 31,531,000

Primality

31,531,001 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 31531001

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 31,531,001)

1 × 31531001

First multiples

31,531,001 · 63,062,002 (double) · 94,593,003 · 126,124,004 · 157,655,005 · 189,186,006 · 220,717,007 · 252,248,008 · 283,779,009 · 315,310,010

Sums & aliquot sequence

As a sum of two squares: 860² + 5,549²

As consecutive integers: 15,765,500 + 15,765,501

Continued fraction of √n

√31,531,001 = [5615; (4, 21, 1, 86, 1, 3, 1, 1, 1, 1, 2, 1, 2, 3, 1, 4, 1, 1, 1, 10, 1, 3, 1, 1, …)]

Representations

In words: thirty-one million five hundred thirty-one thousand one
Ordinal: 31531001st
Binary: 1111000010001111111111001
Octal: 170217771
Hexadecimal: 0x1E11FF9
Base64: AeEf+Q==
One's complement: 4,263,436,294 (32-bit)
Scientific notation: 3.1531001 × 10⁷
As a duration: 31,531,001 s = 364 days, 22 hours, 36 minutes, 41 seconds

In other bases

ternary (3) 2012022221101212

quaternary (4) 1320101333321

quinary (5) 31032443001

senary (6) 3043452505

septenary (7) 532003055

nonary (9) 65287355

undecimal (11) 16886787

duodecimal (12) a687135

tridecimal (13) 66bcac8

tetradecimal (14) 428ac65

pentadecimal (15) 2b7c7bb

As an angle

31,531,001° = 87,586 × 360° + 41°

41° ≈ 0.716 rad

Compass bearing: NE (northeast)

Why does a circle have 360 degrees? →

Historical numeral systems

Chinese: 三千一百五十三萬一千零一
Chinese (financial): 參仟壹佰伍拾參萬壹仟零壹

In other modern scripts

Eastern Arabic ٣١٥٣١٠٠١ Devanagari ३१५३१००१ Bengali ৩১৫৩১০০১ Tamil ௩௧௫௩௧௦௦௧ Thai ๓๑๕๓๑๐๐๑ Tibetan ༣༡༥༣༡༠༠༡ Khmer ៣១៥៣១០០១ Lao ໓໑໕໓໑໐໐໑ Burmese ၃၁၅၃၁၀၀၁

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 31,530,979 (gap of 22)
Next prime: 31,531,057 (gap of 56)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 1.225.31.249.

Address: 1.225.31.249
Class: public
IPv4-mapped IPv6: ::ffff:1.225.31.249

Public, routable address (assignable to a host on the internet).

Possible date

Could be parsed as a date. Most likely interpretation: Thursday, October 1, 3153 (YYYYMMDD (ISO basic)).

Possible US bank routing number

This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.

Routing number

031531001

Federal Reserve

Federal Reserve district 3 (Philadelphia)

Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.

Look up on FedACH (official) ↗ Search Google for routing number 031531001 ↗