78131821 is an odd 8-digits prime number following 78131820
and preceding 78131822 . In scientific notation, it is written as 7.8131821 × 10^7.
The sum of its digits is 31. It has a total of 1 prime factors and 2 positive divisors.
There are 78131820 positive integers (up to 78131821) that are relatively prime to 78131821.
78131821 has 2 divisors, whose sum is 78131822
The reverse of 78131821 is 12813187
Previous prime number is 1
Is Prime? yes
Number parity odd
Number length 8
Sum of Digits 31
Digital Root 4
Name
seventy-eight million one hundred thirty-one thousand eight hundred twenty-one
Scientific notation
7.8131821 × 10^7
Engineering notation
7.8131821 × 10^6
Prime Factorization
78131821
Composite number
ω
Distinct Factors
1
Total number of distinct prime factors
Ω
Total Factors
1
Total number of prime factors
rad
Radical
78131821
Product of the distinct prime numbers
The prime factorization of 78131821 is 78131821.
Since it has a total of 1 prime factors.
5 , 8 , 39 , 70 , 15 , 205 , 8716 , 2131 , 86996 , 71188 , 347424 , 985013 , 8117831 , 6564984 , 66252483 , 6267676 , 767331592 , 208041976 , 5088966935 , 1864409728
n×2
156263642
n×3
234395463
n×4
312527284
n×5
390659105
n÷2
39065910.5
n÷3
26043940.333333
n÷3
19532955.25
n÷5
15626364.2
n2
6104581452776041
n3
4.7696206534822E+23
n4
3.7265914713577E+31
n5
2.9116537778025E+39
2 √n
8839.2206104385
3 √n
427.50642763611
4 √n
94.017129345872
5 √n
37.893575816626
2 divisors
τ
Total Divisors
2
Total number of the positive divisors of n
σ
Sum of Divisors
78131822
Sum of all the positive divisors of n
s
Aliquot Sum
1
Sum of the proper positive divisors of n
A
Arithmetic Mean
39065911
Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G
Geometric Mean
8839.2206670045
Returns the nth root of the product of n divisors
H
Harmonic Mean
1.9999999744022
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 78131821 can be divided by 2 positive divisors.
The sum of these divisors (counting 78131821) is 78131822, the average is 39065911.
Base
System
Value
2
Binary
100101010000011001001101101
3
Ternary
12110000111201011
4
Quaternary
10222003021231
5
Quinary
130000204241
6
Senary
11430345221
8
Octal
452031155
10
Decimal
78131821
12
Duodecimal
221bb211
16
Hexadecimal
4a8326d
20
Vigesimal
14869b1
36
Base36
1aimwd
md5
ba01b8cfac5e902e4f86149f7863a4e5
sha1
4289520aad7338ceb8991e2710a175385f276693
sha256
faba414059a55e106c3b58ea9ecc26ac6d1ef1f768b244f5ea6f59cdd142a342
sha512
2674b21ee20eec7f2a94c6d1ed415cfbe99b96f579d072be0db48f3beffb880a1191fd40f9215f54dd22e6dbceb58eb2dc57980a7b7bd49891009bc4a76cdb2f
ripemd-160
0f9682879df50d3bbccf67a94ff2686b739c2f21
Diameter
156263642
Circumference
490916709.73039
Area
1.9178108245282E+16
Volume
1.9978940273853E+24
Surface area
7.6712432981127E+16
Circumference
490916709.73039
Perimeter
312527284
Area
6104581452776041
Diagonal
110495080.91111
Surface area
36627488716656246
Volume
4.7696206534822E+23
Space diagonal
135328283.65988
Perimeter
234395463
Area
2.6433613087877E+15
Altitude
67664141.829938
Surface area
2.6433613087877E+15
Volume
5.6210518462744E+22
Height
36831693.637036