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

81218085 (number)

81218085 is an odd 8-digits composite number following 81218084 and preceding 81218086. In scientific notation, it is written as 8.1218085 × 10^7. The sum of its digits is 33. It has a total of 3 prime factors and 8 positive divisors. There are 39984192 positive integers (up to 81218085) that are relatively prime to 81218085.

Interesting facts

81218085 has 8 divisors, whose sum is 93296896
The reverse of 81218085 is 58081218
Previous prime number is 13

Basic properties

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

Name

Name	eighty-one million two hundred eighteen thousand eighty-five

Notation

Scientific notation	8.1218085 × 10^7
Engineering notation	8.1218085 × 10^6

Prime Factorization of 81218085

Prime Factorization 15 × 13 × 416503

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81218085	Product of the distinct prime numbers

The prime factorization of 81218085 is 15 × 13 × 416503. Since it has a total of 3 prime factors.

Most popular turbo-numbers

1, 4, 87, 76, 448, 777, 1606, 343, 95895, 16401, 442162, 66034, 9192366, 1653721, 66023434, 6174213, 313523457, 804323290, 7467957346, 838288854

Basic calculations (n = 81218085)

Multiplication

n×y

n×2	162436170
n×3	243654255
n×4	324872340
n×5	406090425

Division

n÷y

n÷2	40609042.5
n÷3	27072695
n÷3	20304521.25
n÷5	16243617

Exponentiation

n^y

n²	6596377331067225
n³	5.3574513476669E+23
n⁴	4.3512193893818E+31
n⁵	3.5339770622046E+39

Nth Root

^y√n

²√n	9012.1076891036
³√n	433.06283545687
⁴√n	94.93212148216
⁵√n	38.188319645049

Divisors of 81218085

1, 13, 15, 195, 416503, 5414539, 6247545, 81218085

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	-81218084	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 81218085 can be divided by 8 positive divisors. The sum of these divisors (counting 81218085) is 1, the average is 0.125.

Base conversion 81218085

Base	System	Value
2	Binary	100110101110100101000100101
3	Ternary	12122211022021020
4	Quaternary	10311310220211
5	Quinary	131242434320
6	Senary	12020441353
8	Octal	465645045
10	Decimal	81218085
12	Duodecimal	23249259
16	Hexadecimal	4d74a25
20	Vigesimal	157c545
36	Base36	1ccs9x

Cryptographic Hash Functions

md5	8fb63f353e397d807d6c955ee3d8c49f
sha1	8308bef552c7683aa003d77a06b740658b747722
sha256	8c8fe05d6cda82ba14c0b955b7ac7726f9ab4f0f14ba3130a73886a16ac81672
sha512	0dde36043163c16d8947ae5dfad841af34332ef4b031568051ab1aaaf76615f9fe4084f0e3d1c3934254bc8812efc95355e14d13ace466d7a3bc16dcc760a185
ripemd-160	fcf46c8165c787b519a8ea36d65c8e86ba509503

81218085 as geometric shapes

Circle

Radius = n

Diameter	162436170
Circumference	510308278.34926
Area	2.0723130563587E+16

Sphere

Radius = n

Volume	2.2441239727727E+24
Surface area	8.2892522254348E+16
Circumference	510308278.34926

Square

Length = n

Perimeter	324872340
Area	6596377331067225
Diagonal	114859717.31697

Cube

Length = n

Surface area	39578263986403350
Volume	5.3574513476669E+23
Space diagonal	140673849.71345

Equilateral Triangle

Length = n

Perimeter	243654255
Area	2.856315170826E+15
Altitude	70336924.856724

Triangular Pyramid

Length = n

Surface area	2.856315170826E+15
Volume	6.3138169630205E+22
Height	38286572.43899