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

81123721 (number)

81123721 is an odd 8-digits composite number following 81123720 and preceding 81123722. In scientific notation, it is written as 8.1123721 × 10^7. The sum of its digits is 25. It has a total of 3 prime factors and 8 positive divisors. There are 67655088 positive integers (up to 81123721) that are relatively prime to 81123721.

Interesting facts

81123721 has 8 divisors, whose sum is 95218880
The reverse of 81123721 is 12732118
Previous prime number is 37

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 25
Digital Root 7

Name

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

Notation

Scientific notation	8.1123721 × 10^7
Engineering notation	8.1123721 × 10^6

Prime Factorization of 81123721

Prime Factorization 7 × 37 × 313219

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81123721	Product of the distinct prime numbers

The prime factorization of 81123721 is 7 × 37 × 313219. Since it has a total of 3 prime factors.

Most popular turbo-numbers

8, 6, 54, 3, 708, 423, 6443, 6898, 10601, 88536, 77794, 345468, 7694034, 7154480, 39824611, 5308553, 295455011, 686883573, 1592874446, 735485546

Basic calculations (n = 81123721)

Multiplication

n×y

n×2	162247442
n×3	243371163
n×4	324494884
n×5	405618605

Division

n÷y

n÷2	40561860.5
n÷3	27041240.333333
n÷3	20280930.25
n÷5	16224744.2

Exponentiation

n^y

n²	6581058108885841
n³	5.3387992191004E+23
n⁴	4.3310325832532E+31
n⁵	3.5134947892574E+39

Nth Root

^y√n

²√n	9006.8707662539
³√n	432.89505107608
⁴√n	94.90453501416
⁵√n	38.179441626033

Divisors of 81123721

1, 7, 37, 259, 313219, 2192533, 11589103, 81123721

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	-81123720	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 81123721 can be divided by 8 positive divisors. The sum of these divisors (counting 81123721) is 1, the average is 0.125.

Base conversion 81123721

Base	System	Value
2	Binary	100110101011101100110001001
3	Ternary	12122122111211021
4	Quaternary	10311131212021
5	Quinary	131231424341
6	Senary	12014432441
8	Octal	465354611
10	Decimal	81123721
12	Duodecimal	23202721
16	Hexadecimal	4d5d989
20	Vigesimal	1570961
36	Base36	1cargp

Cryptographic Hash Functions

md5	1e6280dc5fdd3dc86edf4bb9f060b00a
sha1	19ebf0584c5aa17421207be69d2697d5affc64a2
sha256	0c2e1ed15441c2abf6dfc3dcad800c40e079c27b7653d2cc0cb43de0384cf588
sha512	5dd21573ea82d9762c553530ebc0cb88250e00cca4e7cd367484567ab519f7a899246b3044763b70e06595cb49bd76b57436d7e3b4d6cfb150c364fef3024ce6
ripemd-160	adaa878925c3d53c0c61bc44558f3c4f00f2570a

81123721 as geometric shapes

Circle

Radius = n

Diameter	162247442
Circumference	509715371.85094
Area	2.0675003807723E+16

Sphere

Radius = n

Volume	2.2363109874289E+24
Surface area	8.2700015230893E+16
Circumference	509715371.85094

Square

Length = n

Perimeter	324494884
Area	6581058108885841
Diagonal	114726266.46837

Cube

Length = n

Surface area	39486348653315046
Volume	5.3387992191004E+23
Space diagonal	140510406.47104

Equilateral Triangle

Length = n

Perimeter	243371163
Area	2.8496817530384E+15
Altitude	70255203.235521

Triangular Pyramid

Length = n

Surface area	2.8496817530384E+15
Volume	6.2918352186989E+22
Height	38242088.82279