81081490 (number)

81081490 is an even 8-digits composite number following 81081489 and preceding 81081491. In scientific notation, it is written as 8.1081490 × 10^7. The sum of its digits is 31. It has a total of 4 prime factors and 16 positive divisors. There are 27799344 positive integers (up to 81081490) that are relatively prime to 81081490.

Interesting facts

Basic properties

Name

Name eighty-one million eighty-one thousand four hundred ninety

Notation

Scientific notation 8.1081490 × 10^7
Engineering notation 8.1081490 × 10^6

Prime Factorization of 81081490

Prime Factorization 2 × 5 × 7 × 1158307

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81081490
Product of the distinct prime numbers

The prime factorization of 81081490 is 2 × 5 × 7 × 1158307. Since it has a total of 4 prime factors.

Most popular turbo-numbers

1, 9, 8, 85, 277, 601, 1324, 8688, 40019, 70359, 548168, 209737, 4167578, 84477, 48124294, 5237106, 365880946, 431670404, 8349111275, 2515187864

Basic calculations (n = 81081490)

Multiplication

n×y
n×2 162162980
n×3 243244470
n×4 324325960
n×5 405407450

Division

n÷y
n÷2 40540745
n÷3 27027163.333333
n÷3 20270372.5
n÷5 16216298

Exponentiation

ny
n2 6574208020620100
n3 5.3304658188183E+23
n4 4.3220211098386E+31
n5 3.5043591139716E+39

Nth Root

y√n
2√n 9004.5260841424
3√n 432.81991989
4√n 94.892181364654
5√n 38.1754657437

Divisors of 81081490

1, 2, 5, 7, 10, 14, 35, 70, 1158307, 2316614, 5791535, 8108149, 11583070, 16216298, 40540745, 81081490

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81081489
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81081490 can be divided by 16 positive divisors. The sum of these divisors (counting 81081490) is 1, the average is 0.0625.

Base conversion 81081490

Base System Value
2 Binary 100110101010011010010010010
3 Ternary 12122120100220011
4 Quaternary 10311103102102
5 Quinary 131224101430
6 Senary 12013505134
8 Octal 465232222
10 Decimal 81081490
12 Duodecimal 231a21aa
16 Hexadecimal 4d53492
20 Vigesimal 156f3ea
36 Base36 1c9uvm

Cryptographic Hash Functions

md5 5d01a2d9c9802fb46b06adcf884df5f4
sha1 ef953dc1cb0c64f339194f8d60f7f87ea6d41039
sha256 41541ff61a4b3103442deb08a6508c3aa5f0eaa36ed899ddcce4bd90198621fa
sha512 bc7bf3bae6e7d2133c9c675a054cf90ff992ca77b4caf6ff24ad063c6a17f3323f70eb2790f37baa1e071945f2bc08f8226b4fef9e37633a6c0c3dbb58f977ac
ripemd-160 c54e96bec5ab719e3df7ffa8eac400d345a9ad42

81081490 as geometric shapes

Circle

Radius = n
Diameter 162162980
Circumference 509450026.65223
Area 2.0653483620751E+16

Sphere

Radius = n
Volume 2.2328203008815E+24
Surface area 8.2613934483005E+16
Circumference 509450026.65223

Square

Length = n
Perimeter 324325960
Area 6574208020620100
Diagonal 114666542.81542

Cube

Length = n
Surface area 39445248123720600
Volume 5.3304658188183E+23
Space diagonal 140437260.23339

Equilateral Triangle

Length = n
Perimeter 243244470
Area 2.8467155778102E+15
Altitude 70218630.116694

Triangular Pyramid

Length = n
Surface area 2.8467155778102E+15
Volume 6.2820142122825E+22
Height 38222180.938473