561 is an odd 3-digits composite number following 560
and preceding 562 . In scientific notation, it is written as 5.61 × 10^2.
The sum of its digits is 12. It has a total of 3 prime factors and 8 positive divisors.
There are 320 positive integers (up to 561) that are relatively prime to 561.
561 has 8 divisors, whose sum is 864
The reverse of 561 is 165
Previous prime number is 11
Is Prime? no
Number parity odd
Number length 3
Sum of Digits 12
Digital Root 3
Name
five hundred sixty-one
Scientific notation
5.61 × 10^2
Engineering notation
5.61 × 10^0
Prime Factorization
3 × 11 × 17
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
561
Product of the distinct prime numbers
The prime factorization of 561 is 3 × 11 × 17.
Since it has a total of 3 prime factors.
4 , 9 , 5 , 37 , 220 , 35 , 2654 , 9450 , 27810 , 98995 , 963910 , 478037 , 7426572 , 2721208 , 18275140 , 22707870 , 23658644 , 307842646 , 2651643150 , 6900349244
n×2
1122
n×3
1683
n×4
2244
n×5
2805
n÷2
280.5
n÷3
187
n÷3
140.25
n÷5
112.2
n2
314721
n3
176558481
n4
99049307841
n5
55566661698801
2 √n
23.685438564654
3 √n
8.2474739741226
4 √n
4.8667688012329
5 √n
3.5464396371137
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
-560
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 561 can be divided by 8 positive divisors.
The sum of these divisors (counting 561) is 1, the average is 0.125.
Base
System
Value
2
Binary
1000110001
3
Ternary
202210
4
Quaternary
20301
5
Quinary
4221
6
Senary
2333
8
Octal
1061
10
Decimal
561
12
Duodecimal
3a9
16
Hexadecimal
231
20
Vigesimal
181
36
Base36
fl
md5
58ae749f25eded36f486bc85feb3f0ab
sha1
77c8184f671aa0397dd897541ed5ec0a8be0380b
sha256
04edd1d7736883194af3ddb232c337e53d17bc93cfd2140c4f4c4e0d966798b1
sha512
06ee59456a6a1e2f31848ab7b9dc3f02ea09459f69821447d3061685b79eb7fb8f1fd57adb5e22a4734bbeba5113162ee91c0fdfb691c3991e493e215f509379
ripemd-160
c18b332a2a51b0316c8ac202893a4a6f2807e943
Diameter
1122
Circumference
3524.8669573277
Area
988725.18153043
Volume
739566435.78476
Surface area
3954900.7261217
Circumference
3524.8669573277
Perimeter
2244
Area
314721
Diagonal
793.37380849131
Surface area
1888326
Volume
176558481
Space diagonal
971.68050304614
Perimeter
1683
Area
136278.19055222
Altitude
485.84025152307
Surface area
136278.19055222
Volume
20807616.531849
Height
264.45793616377