81105 (number)

81105 is an odd 5-digits composite number following 81104 and preceding 81106. In scientific notation, it is written as 8.1105 × 10^4. The sum of its digits is 15. It has a total of 2 prime factors and 4 positive divisors. There are 43248 positive integers (up to 81105) that are relatively prime to 81105.

Interesting facts

Basic properties

Name

Name eighty-one thousand one hundred five

Notation

Scientific notation 8.1105 × 10^4
Engineering notation 8.1105 × 10^3

Prime Factorization of 81105

Prime Factorization 15 × 5407

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 81105
Product of the distinct prime numbers

The prime factorization of 81105 is 15 × 5407. Since it has a total of 2 prime factors.

Most popular turbo-numbers

7, 5, 39, 21, 908, 792, 4256, 3860, 80556, 32273, 245514, 511676, 8054630, 9293262, 13531944, 18536512, 237135542, 352762710, 3976869855, 5429902559

Basic calculations (n = 81105)

Multiplication

n×y
n×2 162210
n×3 243315
n×4 324420
n×5 405525

Division

n÷y
n÷2 40552.5
n÷3 27035
n÷3 20276.25
n÷5 16221

Exponentiation

ny
n2 6578021025
n3 533510395232625
n4 4.3270360605342E+19
n5 3.5094425968963E+24

Nth Root

y√n
2√n 284.78939587
3√n 43.286174864354
4√n 16.875704307376
5√n 9.589799467539

Divisors of 81105

1, 15, 5407, 81105

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81104
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 1
Returns the nth root of the product of n divisors
H Harmonic Mean 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81105 can be divided by 4 positive divisors. The sum of these divisors (counting 81105) is 1, the average is 0.25.

Base conversion 81105

Base System Value
2 Binary 10011110011010001
3 Ternary 11010020220
4 Quaternary 103303101
5 Quinary 10043410
6 Senary 1423253
8 Octal 236321
10 Decimal 81105
12 Duodecimal 3ab29
16 Hexadecimal 13cd1
20 Vigesimal a2f5
36 Base36 1qkx

Cryptographic Hash Functions

md5 e83bab0eff11d84c5e7d4199d9fa45a4
sha1 fd077f9f63c2ec41f324d103a536a6feb6e0ee18
sha256 812ee368fcbc74750cff26e384cf8db05c61ab5617f8c611417c19ee70e4820c
sha512 859daa827c37963f529f2bdf5333966847828920f2b898b88824b9cc3923145875cdc8a50638543a929841d7cceed1e66bf70f7fdb5421633674525a6004801a
ripemd-160 3365fb8cb5ed619087ee485eceaf37f14155bcaf

81105 as geometric shapes

Circle

Radius = n
Diameter 162210
Circumference 509597.7443388
Area 20665462527.299

Sphere

Radius = n
Volume 2.2347631177021E+15
Surface area 82661850109.197
Circumference 509597.7443388

Square

Length = n
Perimeter 324420
Area 6578021025
Diagonal 114699.79097627

Cube

Length = n
Surface area 39468126150
Volume 533510395232625
Space diagonal 140477.98074787

Equilateral Triangle

Length = n
Perimeter 243315
Area 2848366657.1391
Altitude 70238.990373937

Triangular Pyramid

Length = n
Surface area 2848366657.1391
Volume 62874803050417
Height 38233.263658757