Live analysis

31,455,740

31,455,740 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.).

31,455,740 (thirty-one million four hundred fifty-five thousand seven hundred forty) is an even 8-digit number. It is a composite number with 24 divisors, and factors as 2² × 5 × 163 × 9,649. Its proper divisors sum to 35,013,460, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x1DFF9FC.

Abundant Number Arithmetic Number Cube-Free Evil Number Semiperfect Number

Interestingness

★ ☆ ☆ ☆ ☆

3 notable facts · grade F

31,455,728 31,455,729 31,455,730 31,455,731 31,455,732 31,455,733 31,455,734 31,455,735 31,455,736 31,455,737 31,455,738 31,455,739 31,455,740 31,455,741 31,455,742 31,455,743 31,455,744 31,455,745 31,455,746 31,455,747 31,455,748 31,455,749 31,455,750 31,455,751 31,455,752

less more

Properties

Parity: Even
Digit count: 8
Digit sum: 29
Digit product: 0
Digital root: 2
Palindrome: No
Bit width: 25 bits
Reversed: 4,755,413
Square (n²): 989,463,578,947,600
Divisor count: 24
σ(n) — sum of divisors: 66,469,200
φ(n) — Euler's totient: 12,503,808
Sum of prime factors: 9,821

Primality

Prime factorization: 2 ² × 5 × 163 × 9649

Nearest primes: 31,455,727 (−13) · 31,455,751 (+11)

Divisors & multiples

All divisors (24)

1 · 2 · 4 · 5 · 10 · 20 · 163 · 326 · 652 · 815 · 1630 · 3260 · 9649 · 19298 · 38596 · 48245 · 96490 · 192980 · 1572787 · 3145574 · 6291148 · 7863935 · 15727870 (half) · 31455740

Aliquot sum (sum of proper divisors): 35,013,460

Factor pairs (a × b = 31,455,740)

1 × 31455740

2 × 15727870

4 × 7863935

5 × 6291148

10 × 3145574

20 × 1572787

163 × 192980

326 × 96490

652 × 48245

815 × 38596

1630 × 19298

3260 × 9649

First multiples

31,455,740 · 62,911,480 (double) · 94,367,220 · 125,822,960 · 157,278,700 · 188,734,440 · 220,190,180 · 251,645,920 · 283,101,660 · 314,557,400

Sums & aliquot sequence

As consecutive integers: 6,291,146 + 6,291,147 + 6,291,148 + 6,291,149 + 6,291,150 3,931,964 + 3,931,965 + … + 3,931,971 786,374 + 786,375 + … + 786,413 192,899 + 192,900 + … + 193,061

Aliquot sequence: 31,455,740 → 35,013,460 → 38,514,848 → 37,452,064 → 42,531,224 → 37,295,776 → 47,206,880 → 81,724,384 → 105,201,152 → 137,863,648 → 168,860,672 → 172,185,904 → 228,899,536 → 259,640,624 → 286,991,056 → 366,681,392 → 547,736,272 — unresolved within range

Continued fraction of √n

√31,455,740 = [5608; (1, 1, 5, 2, 51, 1, 2, 2, 147, 6, 16, 1, 2, 1, 1, 1, 14, 3, 3, 30, 1, 3, 2, 1, …)]

Representations

In words: thirty-one million four hundred fifty-five thousand seven hundred forty
Ordinal: 31455740th
Binary: 1110111111111100111111100
Octal: 167774774
Hexadecimal: 0x1DFF9FC
Base64: Ad/5/A==
One's complement: 4,263,511,555 (32-bit)
Scientific notation: 3.145574 × 10⁷
As a duration: 31,455,740 s = 364 days, 1 hour, 42 minutes, 20 seconds

In other bases

ternary (3) 2012012010011102

quaternary (4) 1313333213330

quinary (5) 31023040430

senary (6) 3042112232

septenary (7) 531240461

nonary (9) 65163142

undecimal (11) 16835188

duodecimal (12) a64b678

tridecimal (13) 6694784

tetradecimal (14) 426b668

pentadecimal (15) 2b65345

As an angle

31,455,740° = 87,377 × 360° + 20°

20° ≈ 0.349 rad

Compass bearing: NNE (north-northeast)

Why does a circle have 360 degrees? →

Historical numeral systems

Chinese: 三千一百四十五萬五千七百四十
Chinese (financial): 參仟壹佰肆拾伍萬伍仟柒佰肆拾

In other modern scripts

Eastern Arabic ٣١٤٥٥٧٤٠ Devanagari ३१४५५७४० Bengali ৩১৪৫৫৭৪০ Tamil ௩௧௪௫௫௭௪௦ Thai ๓๑๔๕๕๗๔๐ Tibetan ༣༡༤༥༥༧༤༠ Khmer ៣១៤៥៥៧៤០ Lao ໓໑໔໕໕໗໔໐ Burmese ၃၁၄၅၅၇၄၀

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 31455740, here are decompositions:

13 + 31455727 = 31455740
37 + 31455703 = 31455740
103 + 31455637 = 31455740
109 + 31455631 = 31455740
241 + 31455499 = 31455740
307 + 31455433 = 31455740
313 + 31455427 = 31455740
331 + 31455409 = 31455740

Showing the first eight; more decompositions exist.

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 1.223.249.252.

Address: 1.223.249.252
Class: public
IPv4-mapped IPv6: ::ffff:1.223.249.252

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