72156721 is an odd 8-digits composite number following 72156720
and preceding 72156722 . In scientific notation, it is written as 7.2156721 × 10^7.
The sum of its digits is 31. It has a total of 4 prime factors and 16 positive divisors.
There are 53731584 positive integers (up to 72156721) that are relatively prime to 72156721.
72156721 has 16 divisors, whose sum is 94034304
The reverse of 72156721 is 12765127
Previous prime number is 17
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 31
Digital Root 4
Name
seventy-two million one hundred fifty-six thousand seven hundred twenty-one
Scientific notation
7.2156721 × 10^7
Engineering notation
7.2156721 × 10^6
Prime Factorization
7 × 13 × 17 × 46643
Composite number
ω
Distinct Factors
4
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
72156721
Product of the distinct prime numbers
The prime factorization of 72156721 is 7 × 13 × 17 × 46643.
Since it has a total of 4 prime factors.
8 , 1 , 65 , 15 , 617 , 917 , 1660 , 4689 , 26127 , 67079 , 735938 , 395944 , 8708432 , 6464152 , 49437788 , 16707874 , 302022040 , 580777638 , 6911084330 , 6118802285
n×2
144313442
n×3
216470163
n×4
288626884
n×5
360783605
n÷2
36078360.5
n÷3
24052240.333333
n÷3
18039180.25
n÷5
14431344.2
n2
5206592385471841
n3
3.7569063411922E+23
n4
2.7108604268453E+31
n5
1.9560679948982E+39
2 √n
8494.5112278459
3 √n
416.31839106875
4 √n
92.165672719543
5 √n
37.295407599008
1 , 7 , 13 , 17 , 91 , 119 , 221 , 1547 , 46643 , 326501 , 606359 , 792931 , 4244513 , 5550517 , 10308103 , 72156721
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
-72156720
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 72156721 can be divided by 16 positive divisors.
The sum of these divisors (counting 72156721) is 1, the average is 0.0625.
Base
System
Value
2
Binary
100010011010000011000110001
3
Ternary
12000202221102011
4
Quaternary
10103100120301
5
Quinary
121433003341
6
Senary
11054322521
8
Octal
423203061
10
Decimal
72156721
12
Duodecimal
201b9441
16
Hexadecimal
44d0631
20
Vigesimal
12ajbg1
36
Base36
16ykhd
md5
868f135b497971cd5961059e0b2d3e0e
sha1
2fb161fc68002a32b2401715c93212d3c4257c80
sha256
48aa82726ec7a777823eac2c174c4acba913eed990cc730cfc7339a3dc5622b5
sha512
ecc189934aa7668168af3db80d02d0c393557ff5abe329b2c6cf746b0123bbf38e28046e6397325093a5c2f48178cf9be8080a2cdac691cb399f738ce2c0e6f2
ripemd-160
d50d19525d1ac41f6dacda9fbf68fd61766d35ea
Diameter
144313442
Circumference
453374049.20146
Area
1.6356992388435E+16
Volume
1.5736892482286E+24
Surface area
6.542796955374E+16
Circumference
453374049.20146
Perimeter
288626884
Area
5206592385471841
Diagonal
102045013.45457
Surface area
31239554312831046
Volume
3.7569063411922E+23
Space diagonal
124979106.87957
Perimeter
216470163
Area
2.2545206364846E+15
Altitude
62489553.439786
Surface area
2.2545206364846E+15
Volume
4.4275565835662E+22
Height
34015004.484857