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

81121491 (number)

81121491 is an odd 8-digits composite number following 81121490 and preceding 81121492. In scientific notation, it is written as 8.1121491 × 10^7. The sum of its digits is 27. It has a total of 3 prime factors and 8 positive divisors. There are 49164480 positive integers (up to 81121491) that are relatively prime to 81121491.

Interesting facts

81121491 has 8 divisors, whose sum is 98329200
The reverse of 81121491 is 19412118
Previous prime number is 11

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 27
Digital Root 9

Name

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

Notation

Scientific notation	8.1121491 × 10^7
Engineering notation	8.1121491 × 10^6

Prime Factorization of 81121491

Prime Factorization 9 × 11 × 819409

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81121491	Product of the distinct prime numbers

The prime factorization of 81121491 is 9 × 11 × 819409. Since it has a total of 3 prime factors.

Most popular turbo-numbers

3, 2, 85, 4, 201, 865, 6609, 9001, 38296, 74871, 611262, 376103, 9202046, 2712147, 5210803, 51971236, 218027663, 665246102, 7569873908, 2000026700

Basic calculations (n = 81121491)

Multiplication

n×y

n×2	162242982
n×3	243364473
n×4	324485964
n×5	405607455

Division

n÷y

n÷2	40560745.5
n÷3	27040497
n÷3	20280372.75
n÷5	16224298.2

Exponentiation

n^y

n²	6580696302063081
n³	5.3383589584154E+23
n⁴	4.3305563819987E+31
n⁵	3.513011905673E+39

Nth Root

^y√n

²√n	9006.7469710212
³√n	432.89108444011
⁴√n	94.903882802661
⁵√n	38.179231721729

Divisors of 81121491

1, 9, 11, 99, 819409, 7374681, 9013499, 81121491

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	-81121490	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 81121491 can be divided by 8 positive divisors. The sum of these divisors (counting 81121491) is 1, the average is 0.125.

Base conversion 81121491

Base	System	Value
2	Binary	100110101011101000011010011
3	Ternary	12122122101202200
4	Quaternary	10311131003103
5	Quinary	131231341431
6	Senary	12014414243
8	Octal	465350323
10	Decimal	81121491
12	Duodecimal	23201383
16	Hexadecimal	4d5d0d3
20	Vigesimal	15703eb
36	Base36	1capqr

Cryptographic Hash Functions

md5	08ee3757876eebfd065f29f0cea006f1
sha1	f7b165af150b98e45df94f823995cc578907f10e
sha256	a8f46d721250ea8e6c7994b39377c333dcd6af894c8c577940cf98a11b5cb4ab
sha512	690f87974bb392e0d6be6a44a3b1739e46d461f3ea71a3324fea34f71eaea9510c7964045bfa70e0b3beb4d265306486b3d7d2bb2bef585bcdf27322323e48ac
ripemd-160	2c432f3f272546f11e702052d5c9807eb5ce1c31

81121491 as geometric shapes

Circle

Radius = n

Diameter	162242982
Circumference	509701360.3477
Area	2.0673867158067E+16

Sphere

Radius = n

Volume	2.2361265714644E+24
Surface area	8.2695468632268E+16
Circumference	509701360.3477

Square

Length = n

Perimeter	324485964
Area	6580696302063081
Diagonal	114723112.77213

Cube

Length = n

Surface area	39484177812378486
Volume	5.3383589584154E+23
Space diagonal	140506543.99774

Equilateral Triangle

Length = n

Perimeter	243364473
Area	2.8495250860885E+15
Altitude	70253271.998871

Triangular Pyramid

Length = n

Surface area	2.8495250860885E+15
Volume	6.2913163665058E+22
Height	38241037.590709