821988081 is an odd 9-digits composite number following 821988080
and preceding 821988082 . In scientific notation, it is written as 8.21988081 × 10^8.
The sum of its digits is 45. It has a total of 5 prime factors and 24 positive divisors.
There are 543970080 positive integers (up to 821988081) that are relatively prime to 821988081.
821988081 has 24 divisors, whose sum is 1240328544
The reverse of 821988081 is 180889128
Previous prime number is 137
Is Prime? no Number parity odd Number length 9 Sum of Digits 45 Digital Root 9
Name
eight hundred twenty-one million nine hundred eighty-eight thousand eighty-one
Scientific notation
8.21988081 × 10^8
Engineering notation
8.21988081 × 10^6
Prime Factorization
9 × 9 × 3 × 137 × 24691
Composite number
ω Distinct Factors
4 Total number of distinct prime factors
Ω Total Factors
5 Total number of prime factors
rad Radical
91332009 Product of the distinct prime numbers
The prime factorization of 821988081 is 9 × 9 × 3 × 137 × 24691.
Since it has a total of 5 prime factors.
8 , 3 , 21 , 89 , 176 , 932 , 5297 , 3483 , 74081 , 7029 , 166294 , 440308 , 4861369 , 9243115 , 84216310 , 71807732 , 600069433 , 190241131 , 7990403031 , 8585106738
n×2
1643976162
n×3
2465964243
n×4
3287952324
n×5
4109940405
n÷2
410994040.5
n÷3
273996027
n÷3
205497020.25
n÷5
164397616.2
n2
675664405306062561
n3
5.5538808791754E+26
n4
4.565223885976E+35
n5
3.7525596213687E+44
2 √n28670.334511477
3 √n936.74598444049
4 √n169.32316590318
5 √n60.669875543441
1 , 3 , 9 , 27 , 81 , 137 , 243 , 411 , 1233 , 3699 , 11097 , 24691 , 33291 , 74073 , 222219 , 666657 , 1999971 , 3382667 , 5999913 , 10148001 , 30444003 , 91332009 , 273996027 , 821988081
24 divisors
τ Total Divisors
24 Total number of the positive divisors of n
σ Sum of Divisors
1 Sum of all the positive divisors of n
s Aliquot Sum
-821988080 Sum of the proper positive divisors of n
A Arithmetic Mean
0.041666666666667 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
24 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 821988081 can be divided by 24 positive divisors.
The sum of these divisors (counting 821988081) is 1, the average is 0.041666666666667.
Base
System
Value
2
Binary
110000111111101000101011110001
3
Ternary
2010021201022200000
4
Quaternary
300333220223301
5
Quinary
3140412104311
6
Senary
213322020213
8
Octal
6077505361
10
Decimal
821988081
12
Duodecimal
1ab347669
16
Hexadecimal
30fe8af1
20
Vigesimal
cgh8a41
36
Base36
dle229
md5
f508fae43fcf2397f7de0c731f6ab22b
sha1
edc9f64ae6a075dee2cdd508099e1d7fc58022b1
sha256
30ec46ce62934019ec21ebb7ffb68b2cf3756da4fbbccb193d915a7e10ac24f5
sha512
f8705366f7c0cbe72f670c7ae28e538c87cb950ddf90bc16fd39d5ef20360a3564864cfb405d067281bcb5b8680a2a0fbddf3c82f3a6413e11867f4fbdb8e7c1
ripemd-160
3abb97446ab17cb12134b3848c839340c43d37f0
Diameter
1643976162
Circumference
5164703433.2159
Area
2.1226623320016E+18
Volume
2.326404182524E+27
Surface area
8.4906493280066E+18
Circumference
5164703433.2159
Perimeter
3287952324
Area
675664405306062561
Diagonal
1162466692.2592
Surface area
4053986431836375366
Volume
5.5538808791754E+26
Space diagonal
1423725119.508
Perimeter
2465964243
Area
2.9257126971398E+17
Altitude
711862559.75402
Surface area
2.9257126971398E+17
Volume
6.5453113859453E+25
Height
387488897.41974