72181881 is an odd 8-digits composite number following 72181880
and preceding 72181882 . In scientific notation, it is written as 7.2181881 × 10^7.
The sum of its digits is 36. It has a total of 4 prime factors and 16 positive divisors.
There are 45290304 positive integers (up to 72181881) that are relatively prime to 72181881.
72181881 has 16 divisors, whose sum is 113227200
The reverse of 72181881 is 18818127
Previous prime number is 17
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 36
Digital Root 9
Name
seventy-two million one hundred eighty-one thousand eight hundred eighty-one
Scientific notation
7.2181881 × 10^7
Engineering notation
7.2181881 × 10^6
Prime Factorization
3 × 9 × 17 × 157259
Composite number
ω
Distinct Factors
4
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
72181881
Product of the distinct prime numbers
The prime factorization of 72181881 is 3 × 9 × 17 × 157259.
Since it has a total of 4 prime factors.
2 , 8 , 56 , 20 , 773 , 4 , 1560 , 2825 , 23166 , 13700 , 540170 , 616665 , 2462176 , 6571666 , 28365901 , 48376100 , 299914559 , 841980135 , 1150140235 , 408605347
n×2
144363762
n×3
216545643
n×4
288727524
n×5
360909405
n÷2
36090940.5
n÷3
24060627
n÷3
18045470.25
n÷5
14436376.2
n2
5210223944698161
n3
3.7608376475955E+23
n4
2.7146433553906E+31
n5
1.9594806363625E+39
2 √n
8495.992055081
3 √n
416.36677350338
4 √n
92.173705876899
5 √n
37.298008109656
1 , 3 , 9 , 17 , 27 , 51 , 153 , 459 , 157259 , 471777 , 1415331 , 2673403 , 4245993 , 8020209 , 24060627 , 72181881
16 divisors
τ
Total Divisors
16
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-72181880
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.0625
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
16
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 72181881 can be divided by 16 positive divisors.
The sum of these divisors (counting 72181881) is 1, the average is 0.0625.
Base
System
Value
2
Binary
100010011010110100001111001
3
Ternary
12000211012221000
4
Quaternary
10103112201321
5
Quinary
121434310011
6
Senary
11055035213
8
Octal
423264171
10
Decimal
72181881
12
Duodecimal
2020bb09
16
Hexadecimal
44d6879
20
Vigesimal
12b2ee1
36
Base36
16z3w9
md5
f21e25ac46217e594708b982785c36e3
sha1
2acb43dba0084334d877ffe59f90c74be2b44dac
sha256
4e04e4a47eeba85494f38e1da33b6b0a2f106b1b3ca3909cb2ae52e23e17b654
sha512
9d5cbcc6031d4307e1b735a19b44f8d5d7efd14b6b94206123b52c2398094305e2c0c5264d46d5310c6a1b118bbba1dd0dd8e33d49bd02aa7cb6d66356665f09
ripemd-160
7ff8005910028166ab95d9a61be503841e7c6c27
Diameter
144363762
Circumference
453532134.14379
Area
1.6368401268221E+16
Volume
1.575335990004E+24
Surface area
6.5473605072886E+16
Circumference
453532134.14379
Perimeter
288727524
Area
5210223944698161
Diagonal
102080595.0678
Surface area
31261343668188966
Volume
3.7608376475955E+23
Space diagonal
125022685.27789
Perimeter
216545643
Area
2.2560931477573E+15
Altitude
62511342.638945
Surface area
2.2560931477573E+15
Volume
4.4321896725941E+22
Height
34026865.0226