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

81998981 (number)

81998981 is an odd 8-digits composite number following 81998980 and preceding 81998982. In scientific notation, it is written as 8.1998981 × 10^7. The sum of its digits is 53. It has a total of 2 prime factors and 4 positive divisors. There are 81979500 positive integers (up to 81998981) that are relatively prime to 81998981.

Interesting facts

81998981 has 4 divisors, whose sum is 82018464
The reverse of 81998981 is 18989918
Previous prime number is 13331

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 53
Digital Root 8

Name

Name	eighty-one million nine hundred ninety-eight thousand nine hundred eighty-one

Notation

Scientific notation	8.1998981 × 10^7
Engineering notation	8.1998981 × 10^6

Prime Factorization of 81998981

Prime Factorization 13331 × 6151

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	81998981	Product of the distinct prime numbers

The prime factorization of 81998981 is 13331 × 6151. Since it has a total of 2 prime factors.

Most popular turbo-numbers

2, 1, 17, 63, 413, 657, 1738, 5, 40236, 87897, 40810, 35807, 4159656, 3119928, 13755231, 96649776, 799691554, 60954360, 4663570212, 8416033985

Basic calculations (n = 81998981)

Multiplication

n×y

n×2	163997962
n×3	245996943
n×4	327995924
n×5	409994905

Division

n÷y

n÷2	40999490.5
n÷3	27332993.666667
n÷3	20499745.25
n÷5	16399796.2

Exponentiation

n^y

n²	6723832885038361
n³	5.5134744498744E+23
n⁴	4.5209928665923E+31
n⁵	3.7071680816884E+39

Nth Root

^y√n

²√n	9055.3288731001
³√n	434.44634896508
⁴√n	95.159491765667
⁵√n	38.26147348419

Divisors of 81998981

1, 6151, 13331, 81998981

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	-81998980	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 81998981 can be divided by 4 positive divisors. The sum of these divisors (counting 81998981) is 1, the average is 0.25.

Base conversion 81998981

Base	System	Value
2	Binary	100111000110011010010000101
3	Ternary	12201021222110022
4	Quaternary	10320303102011
5	Quinary	131442431411
6	Senary	12045304525
8	Octal	470632205
10	Decimal	81998981
12	Duodecimal	23565145
16	Hexadecimal	4e33485
20	Vigesimal	15c9h91
36	Base36	1ctith

Cryptographic Hash Functions

md5	c1b8cec99524671e6d98dd0292342f04
sha1	b169d71717c6ceafcf40ae69a07267c8183c28fe
sha256	49c8a73b61f67536aeb54e7834e46d90f6dfee235d10d6426419153200b48a7e
sha512	74c96d36a41e7a3b005d254f477250e09bee5009e0beb50c887da8c83c827b86df1043e4b02eed0e77488489b8e597acf830acda9786fd4db57f5af8827eaa8b
ripemd-160	bdfc9ec62e1e0114bb8b2b04e6cf9e0317c070a0

81998981 as geometric shapes

Circle

Radius = n

Diameter	163997962
Circumference	515214792.6229
Area	2.1123543995602E+16

Sphere

Radius = n

Volume	2.3094787769974E+24
Surface area	8.4494175982408E+16
Circumference	515214792.6229

Square

Length = n

Perimeter	327995924
Area	6723832885038361
Diagonal	115964071.03097

Cube

Length = n

Surface area	40342997310230166
Volume	5.5134744498744E+23
Space diagonal	142026401.26088

Equilateral Triangle

Length = n

Perimeter	245996943
Area	2.9115050446222E+15
Altitude	71013200.630438

Triangular Pyramid

Length = n

Surface area	2.9115050446222E+15
Volume	6.4976919523415E+22
Height	38654690.343658