221 (number)

221 is an odd 3-digits composite number following 220 and preceding 222. In scientific notation, it is written as 2.21 × 10^2. The sum of its digits is 5. It has a total of 2 prime factors and 4 positive divisors. There are 192 positive integers (up to 221) that are relatively prime to 221.

Interesting facts

Basic properties

Name

Name two hundred twenty-one

Notation

Scientific notation 2.21 × 10^2
Engineering notation 2.21 × 10^0

Prime Factorization of 221

Prime Factorization 13 × 17

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 221
Product of the distinct prime numbers

The prime factorization of 221 is 13 × 17. Since it has a total of 2 prime factors.

Most popular turbo-numbers

Basic calculations (n = 221)

Multiplication

n×y
n×2 442
n×3 663
n×4 884
n×5 1105

Division

n÷y
n÷2 110.5
n÷3 73.666666666667
n÷3 55.25
n÷5 44.2

Exponentiation

ny
n2 48841
n3 10793861
n4 2385443281
n5 527182965101

Nth Root

y√n
2√n 14.866068747319
3√n 6.0459435960125
4√n 3.8556541270345
5√n 2.9435976987923

Divisors of 221

1, 13, 17, 221

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -220
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
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 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 221 can be divided by 4 positive divisors. The sum of these divisors (counting 221) is 1, the average is 0.25.

Base conversion 221

Base System Value
2 Binary 11011101
3 Ternary 22012
4 Quaternary 3131
5 Quinary 1341
6 Senary 1005
8 Octal 335
10 Decimal 221
12 Duodecimal 165
16 Hexadecimal dd
20 Vigesimal b1
36 Base36 65

Cryptographic Hash Functions

md5 060ad92489947d410d897474079c1477
sha1 9a70776c743352cfcf688e52512673332e5e4007
sha256 67e9c3acebb154a282f326d4ff1951cd1f342e58e74d562b556b517da5e56132
sha512 cc9aab6fee3af4f819209bf43e3bc6f8f02ecbf5d2f27815b9a2132d3dbbfe9ba72d6024794487c37affbc6828040ed74d3d2671bb962b44c95f9070d4e2db48
ripemd-160 4bdbd27cd6cb798409a7ad89cf68977ec5a77cdf

221 as geometric shapes

Circle

Radius = n
Diameter 442
Circumference 1388.5839528867
Area 153438.52679398

Sphere

Radius = n
Volume 45213219.228626
Surface area 613754.10717592
Circumference 1388.5839528867

Square

Length = n
Perimeter 884
Area 48841
Diagonal 312.54119728445

Cube

Length = n
Surface area 293046
Volume 10793861
Space diagonal 382.78322847272

Equilateral Triangle

Length = n
Perimeter 663
Area 21148.773373118
Altitude 191.39161423636

Triangular Pyramid

Length = n
Surface area 21148.773373118
Volume 1272068.7180475
Height 104.18039909482