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

81001491 (number)

81001491 is an odd 8-digits composite number following 81001490 and preceding 81001492. In scientific notation, it is written as 8.1001491 × 10^7. The sum of its digits is 24. It has a total of 2 prime factors and 4 positive divisors. There are 54000992 positive integers (up to 81001491) that are relatively prime to 81001491.

Interesting facts

81001491 has 4 divisors, whose sum is 108001992
The reverse of 81001491 is 19410018
Previous prime number is 3

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 24
Digital Root 6

Name

Name	eighty-one million one thousand four hundred ninety-one

Notation

Scientific notation	8.1001491 × 10^7
Engineering notation	8.1001491 × 10^6

Prime Factorization of 81001491

Prime Factorization 3 × 27000497

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	81001491	Product of the distinct prime numbers

The prime factorization of 81001491 is 3 × 27000497. Since it has a total of 2 prime factors.

Most popular turbo-numbers

9, 1, 2, 54, 769, 316, 2225, 4427, 79367, 60207, 220625, 992581, 9322810, 586833, 17046492, 65405605, 563011033, 966338165, 4924371229, 9432055664

Basic calculations (n = 81001491)

Multiplication

n×y

n×2	162002982
n×3	243004473
n×4	324005964
n×5	405007455

Division

n÷y

n÷2	40500745.5
n÷3	27000497
n÷3	20250372.75
n÷5	16200298.2

Exponentiation

n^y

n²	6561241544223081
n³	5.3147034789321E+23
n⁴	4.3049890601639E+31
n⁵	3.4871053261196E+39

Nth Root

^y√n

²√n	9000.0828329522
³√n	432.67752588348
⁴√n	94.868766372037
⁵√n	38.167929609156

Divisors of 81001491

1, 3, 27000497, 81001491

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	-81001490	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 81001491 can be divided by 4 positive divisors. The sum of these divisors (counting 81001491) is 1, the average is 0.25.

Base conversion 81001491

Base	System	Value
2	Binary	100110100111111110000010011
3	Ternary	12122102022011020
4	Quaternary	10310333300103
5	Quinary	131214021431
6	Senary	12012050523
8	Octal	464776023
10	Decimal	81001491
12	Duodecimal	23163a43
16	Hexadecimal	4d3fc13
20	Vigesimal	15653eb
36	Base36	1c855f

Cryptographic Hash Functions

md5	9d1b83e97217015925ff217e9b72c1c2
sha1	901c717e9bb414695de1fd0c19b373330c60818a
sha256	58f26cdb5646ea650e9f0ed3c2c6aed4b43ba6c8e31965355c8b41979e5bec29
sha512	46ea02c11566994c7c72534d063f77f67ae8bff186847b35c6590efa8a5c0bfdeb837f24649db2161342cf9e4fff18695ddb498ff8f4981ba7316fc7528c1b16
ripemd-160	cff1bdfadaccc1847f40eafab320e2296382995f

81001491 as geometric shapes

Circle

Radius = n

Diameter	162002982
Circumference	508947378.11084
Area	2.0612748233759E+16

Sphere

Radius = n

Volume	2.2262177873895E+24
Surface area	8.2450992935038E+16
Circumference	508947378.11084

Square

Length = n

Perimeter	324005964
Area	6561241544223081
Diagonal	114553407.14464

Cube

Length = n

Surface area	39367449265338486
Volume	5.3147034789321E+23
Space diagonal	140298697.90083

Equilateral Triangle

Length = n

Perimeter	243004473
Area	2.8411009288315E+15
Altitude	70149348.950417

Triangular Pyramid

Length = n

Surface area	2.8411009288315E+15
Volume	6.2634381165811E+22
Height	38184469.048214