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

81720121 (number)

81720121 is an odd 8-digits composite number following 81720120 and preceding 81720122. In scientific notation, it is written as 8.1720121 × 10^7. The sum of its digits is 22. It has a total of 3 prime factors and 8 positive divisors. There are 66359088 positive integers (up to 81720121) that are relatively prime to 81720121.

Interesting facts

81720121 has 8 divisors, whose sum is 98310080
The reverse of 81720121 is 12102718
Previous prime number is 19

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 22
Digital Root 4

Name

Name	eighty-one million seven hundred twenty thousand one hundred twenty-one

Notation

Scientific notation	8.1720121 × 10^7
Engineering notation	8.1720121 × 10^6

Prime Factorization of 81720121

Prime Factorization 7 × 19 × 614437

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81720121	Product of the distinct prime numbers

The prime factorization of 81720121 is 7 × 19 × 614437. Since it has a total of 3 prime factors.

Most popular turbo-numbers

8, 10, 57, 16, 608, 752, 4208, 1456, 42743, 20690, 955464, 147027, 9379454, 6257110, 4651050, 95102725, 926030554, 624549387, 348404963, 1331596170

Basic calculations (n = 81720121)

Multiplication

n×y

n×2	163440242
n×3	245160363
n×4	326880484
n×5	408600605

Division

n÷y

n÷2	40860060.5
n÷3	27240040.333333
n÷3	20430030.25
n÷5	16344024.2

Exponentiation

n^y

n²	6678178176254641
n³	5.4574152862309E+23
n⁴	4.4598063753804E+31
n⁵	3.6445591663266E+39

Nth Root

^y√n

²√n	9039.9181965325
³√n	433.95330502027
⁴√n	95.078484403847
⁵√n	38.235414286861

Divisors of 81720121

1, 7, 19, 133, 614437, 4301059, 11674303, 81720121

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	-81720120	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 81720121 can be divided by 8 positive divisors. The sum of these divisors (counting 81720121) is 1, the average is 0.125.

Base conversion 81720121

Base	System	Value
2	Binary	100110111101111001100111001
3	Ternary	12200202210221011
4	Quaternary	10313233030321
5	Quinary	131410020441
6	Senary	12035313521
8	Octal	467571471
10	Decimal	81720121
12	Duodecimal	2344b8a1
16	Hexadecimal	4def339
20	Vigesimal	15af061
36	Base36	1cnjnd

Cryptographic Hash Functions

md5	4f74b6c26137634c0e6a83550428ddab
sha1	ff2652c507bfe049d0c9d5c3c629394c5e4c5c35
sha256	b56b2d53d55413dc9662f90d84d4b4bae288dcf9c0a578f82041095cf7c38002
sha512	0e6861d76ceb481e52e8bbe440c68b8b2e0fd018b695bf7913c51e0e7e3fef52b86c758e362c16921b9e38d270711bcf3aa18c842e12c9b1f0521d58481fdf06
ripemd-160	de38b69ce30624c6084cba6f43d6b0acd4aa7f7f

81720121 as geometric shapes

Circle

Radius = n

Diameter	163440242
Circumference	513462663.56814
Area	2.0980115497885E+16

Sphere

Radius = n

Volume	2.2859967694415E+24
Surface area	8.3920461991541E+16
Circumference	513462663.56814

Square

Length = n

Perimeter	326880484
Area	6678178176254641
Diagonal	115569703.43697

Cube

Length = n

Surface area	40069069057527846
Volume	5.4574152862309E+23
Space diagonal	141543401.57268

Equilateral Triangle

Length = n

Perimeter	245160363
Area	2.8917359758177E+15
Altitude	70771700.786338

Triangular Pyramid

Length = n

Surface area	2.8917359758177E+15
Volume	6.4316255944083E+22
Height	38523234.47899