Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

81445821 (number)

81445821 is an odd 8-digits composite number following 81445820 and preceding 81445822. In scientific notation, it is written as 8.1445821 × 10^7. The sum of its digits is 33. It has a total of 2 prime factors and 4 positive divisors. There are 54297212 positive integers (up to 81445821) that are relatively prime to 81445821.

Interesting facts

81445821 has 4 divisors, whose sum is 108594432
The reverse of 81445821 is 12854418
Previous prime number is 3

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 33
Digital Root 6

Name

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

Notation

Scientific notation	8.1445821 × 10^7
Engineering notation	8.1445821 × 10^6

Prime Factorization of 81445821

Prime Factorization 3 × 27148607

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	81445821	Product of the distinct prime numbers

The prime factorization of 81445821 is 3 × 27148607. Since it has a total of 2 prime factors.

Most popular turbo-numbers

6, 10, 7, 100, 32, 475, 1600, 2977, 98877, 15480, 910909, 666319, 2343528, 1528531, 63239613, 5220627, 165712209, 641135425, 7886513684, 4414771390

Basic calculations (n = 81445821)

Multiplication

n×y

n×2	162891642
n×3	244337463
n×4	325783284
n×5	407229105

Division

n÷y

n÷2	40722910.5
n÷3	27148607
n÷3	20361455.25
n÷5	16289164.2

Exponentiation

n^y

n²	6633421758364041
n³	5.4026448114922E+23
n⁴	4.4002284224337E+31
n⁵	3.5838021645265E+39

Nth Root

^y√n

²√n	9024.733846491
³√n	433.4672279862
⁴√n	94.99859918173
⁵√n	38.209711720786

Divisors of 81445821

1, 3, 27148607, 81445821

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	-81445820	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 81445821 can be divided by 4 positive divisors. The sum of these divisors (counting 81445821) is 1, the average is 0.25.

Base conversion 81445821

Base	System	Value
2	Binary	100110110101100001110111101
3	Ternary	12200020212122220
4	Quaternary	10312230032331
5	Quinary	131322231241
6	Senary	12025355553
8	Octal	466541675
10	Decimal	81445821
12	Duodecimal	23338bb9
16	Hexadecimal	4dac3bd
20	Vigesimal	1590eb1
36	Base36	1chnzx

Cryptographic Hash Functions

md5	7457d51c5a578a88559b2f9c126b10d1
sha1	96dcf1f0e272a25921c53a79300881de03a787b1
sha256	a569ae7e4e91d48086eace68c036fb5424f210305743d9361ccff214387e3377
sha512	7197b10a00b54ccdef9b16583eb9da539cb5e689ea915f001a30fd136d13bf28ab0b4e935c696b05467b6029059b9af732ab909d730b5569aa3031f42878f112
ripemd-160	d7cc55adb239d8d681f60e880060f0fea23560a5

81445821 as geometric shapes

Circle

Radius = n

Diameter	162891642
Circumference	511739185.83838
Area	2.0839509064239E+16

Sphere

Radius = n

Volume	2.2630545666319E+24
Surface area	8.3358036256957E+16
Circumference	511739185.83838

Square

Length = n

Perimeter	325783284
Area	6633421758364041
Diagonal	115181784.65681

Cube

Length = n

Surface area	39800530550184246
Volume	5.4026448114922E+23
Space diagonal	141068300.03616

Equilateral Triangle

Length = n

Perimeter	244337463
Area	2.8723558783798E+15
Altitude	70534150.01808

Triangular Pyramid

Length = n

Surface area	2.8723558783798E+15
Volume	6.3670779709141E+22
Height	38393928.218937