81361281 (number)

81361281 is an odd 8-digits composite number following 81361280 and preceding 81361282. In scientific notation, it is written as 8.1361281 × 10^7. The sum of its digits is 30. It has a total of 3 prime factors and 8 positive divisors. There are 51882512 positive integers (up to 81361281) that are relatively prime to 81361281.

Interesting facts

Basic properties

Name

Name eighty-one million three hundred sixty-one thousand two hundred eighty-one

Notation

Scientific notation 8.1361281 × 10^7
Engineering notation 8.1361281 × 10^6

Prime Factorization of 81361281

Prime Factorization 23 × 3 × 1179149

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 81361281
Product of the distinct prime numbers

The prime factorization of 81361281 is 23 × 3 × 1179149. Since it has a total of 3 prime factors.

Most popular turbo-numbers

6, 5, 8, 36, 122, 272, 458, 3921, 50892, 26864, 184256, 685648, 417996, 1191645, 92688055, 96210924, 613555289, 160856653, 6349668859, 1250252553

Basic calculations (n = 81361281)

Multiplication

n×y
n×2 162722562
n×3 244083843
n×4 325445124
n×5 406806405

Division

n÷y
n÷2 40680640.5
n÷3 27120427
n÷3 20340320.25
n÷5 16272256.2

Exponentiation

ny
n2 6619658045960961
n3 5.3858385840134E+23
n4 4.3819872645456E+31
n5 3.5652409716911E+39

Nth Root

y√n
2√n 9020.048835788
3√n 433.31719775553
4√n 94.973937666014
5√n 38.201776160649

Divisors of 81361281

1, 3, 23, 69, 1179149, 3537447, 27120427, 81361281

8 divisors

τ Total Divisors 8
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81361280
Sum of the proper positive divisors of n
A Arithmetic Mean 0.125
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 8
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81361281 can be divided by 8 positive divisors. The sum of these divisors (counting 81361281) is 1, the average is 0.125.

Base conversion 81361281

Base System Value
2 Binary 100110110010111100110000001
3 Ternary 12200002120200210
4 Quaternary 10312113212001
5 Quinary 131312030111
6 Senary 12023504333
8 Octal 466274601
10 Decimal 81361281
12 Duodecimal 232b80a9
16 Hexadecimal 4d97981
20 Vigesimal 158a341
36 Base36 1cfurl

Cryptographic Hash Functions

md5 589d131dd47e2675aafc54f4763322c7
sha1 de8b69cf9f37a4c4170473612665251ddf117e6b
sha256 039a2d0e8627198ceab553828bd39549ba00932a95c4376867606667e20c6b30
sha512 50618d4fb1152dba49f10bcb147eb1a394e2aa6580d2e125d8b92128edb201b58ad6d08742ddd631966b0cb44ffedc79ed517eb136759b70d9aff870b0aaa841
ripemd-160 38c478873ca629e24a33115e9d0a508835a128d3

81361281 as geometric shapes

Circle

Radius = n
Diameter 162722562
Circumference 511208005.35251
Area 2.0796269086468E+16

Sphere

Radius = n
Volume 2.2560147905276E+24
Surface area 8.318507634587E+16
Circumference 511208005.35251

Square

Length = n
Perimeter 325445124
Area 6619658045960961
Diagonal 115062227.04225

Cube

Length = n
Surface area 39717948275765766
Volume 5.3858385840134E+23
Space diagonal 140921872.46089

Equilateral Triangle

Length = n
Perimeter 244083843
Area 2.8663960160841E+15
Altitude 70460936.230444

Triangular Pyramid

Length = n
Surface area 2.8663960160841E+15
Volume 6.3472716418867E+22
Height 38354075.680749