81445815 (number)

81445815 is an odd 8-digits composite number following 81445814 and preceding 81445816. In scientific notation, it is written as 8.1445815 × 10^7. The sum of its digits is 36. It has a total of 4 prime factors and 16 positive divisors. There are 39168000 positive integers (up to 81445815) that are relatively prime to 81445815.

Interesting facts

Basic properties

Name

Name eighty-one million four hundred forty-five thousand eight hundred fifteen

Notation

Scientific notation 8.1445815 × 10^7
Engineering notation 8.1445815 × 10^6

Prime Factorization of 81445815

Prime Factorization 5 × 99 × 137 × 1201

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81445815
Product of the distinct prime numbers

The prime factorization of 81445815 is 5 × 99 × 137 × 1201. Since it has a total of 4 prime factors.

Most popular turbo-numbers

6, 9, 22, 46, 638, 12, 8110, 83, 50770, 6785, 884741, 247303, 1269196, 2296178, 2429469, 90547481, 240514245, 932401577, 7031909098, 1412901773

Basic calculations (n = 81445815)

Multiplication

n×y
n×2 162891630
n×3 244337445
n×4 325783260
n×5 407229075

Division

n÷y
n÷2 40722907.5
n÷3 27148605
n÷3 20361453.75
n÷5 16289163

Exponentiation

ny
n2 6633420781014225
n3 5.4026436174764E+23
n4 4.4002271257991E+31
n5 3.5838008444582E+39

Nth Root

y√n
2√n 9024.7335140712
3√n 433.4672173419
4√n 94.998597432126
5√n 38.209711157814

Divisors of 81445815

1, 5, 99, 137, 495, 685, 1201, 6005, 13563, 67815, 118899, 164537, 594495, 822685, 16289163, 81445815

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 -81445814
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 81445815 can be divided by 16 positive divisors. The sum of these divisors (counting 81445815) is 1, the average is 0.0625.

Base conversion 81445815

Base System Value
2 Binary 100110110101100001110110111
3 Ternary 12200020212122200
4 Quaternary 10312230032313
5 Quinary 131322231230
6 Senary 12025355543
8 Octal 466541667
10 Decimal 81445815
12 Duodecimal 23338bb3
16 Hexadecimal 4dac3b7
20 Vigesimal 1590eaf
36 Base36 1chnzr

Cryptographic Hash Functions

md5 45fee29efcb3e3cb0a2034777eb84354
sha1 5e9ddd76c9864d46b6870207253ab63a1ffa4d85
sha256 1907c3cda1ad9250e17c1ed522c5548816e5f19cd5dc0558ba905ece3f1427cf
sha512 46ddde7eabbf2a08aef3e085438c385af60f4764fc68c8b1c4cc2dc048dac5cc95cf2d15b600bf778f9dc12052d907e48b5a1d32ffc12e2b31156e8a428a1811
ripemd-160 684fdc0c7fe4c48b7225ded2df801d9f0ccbb80d

81445815 as geometric shapes

Circle

Radius = n
Diameter 162891630
Circumference 511739148.13927
Area 2.0839505993804E+16

Sphere

Radius = n
Volume 2.2630540664837E+24
Surface area 8.3358023975217E+16
Circumference 511739148.13927

Square

Length = n
Perimeter 325783260
Area 6633420781014225
Diagonal 115181776.17153

Cube

Length = n
Surface area 39800524686085350
Volume 5.4026436174764E+23
Space diagonal 141068289.64386

Equilateral Triangle

Length = n
Perimeter 244337445
Area 2.872355455175E+15
Altitude 70534144.821928

Triangular Pyramid

Length = n
Surface area 2.872355455175E+15
Volume 6.367076563753E+22
Height 38393925.39051