21091 (number)

21091 is an odd 5-digits composite number following 21090 and preceding 21092. In scientific notation, it is written as 2.1091 × 10^4. The sum of its digits is 13. It has a total of 2 prime factors and 4 positive divisors. There are 17160 positive integers (up to 21091) that are relatively prime to 21091.

Interesting facts

Basic properties

Name

Name twenty-one thousand ninety-one

Notation

Scientific notation 2.1091 × 10^4
Engineering notation 2.1091 × 10^3

Prime Factorization of 21091

Prime Factorization 161 × 131

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 21091
Product of the distinct prime numbers

The prime factorization of 21091 is 161 × 131. Since it has a total of 2 prime factors.

Most popular turbo-numbers

1, 6, 68, 59, 528, 716, 2607, 9841, 73939, 86466, 119882, 195780, 2321148, 5327488, 15742283, 94885067, 641103399, 587780880, 4661891772, 4188430462

Basic calculations (n = 21091)

Multiplication

n×y
n×2 42182
n×3 63273
n×4 84364
n×5 105455

Division

n÷y
n÷2 10545.5
n÷3 7030.3333333333
n÷3 5272.75
n÷5 4218.2

Exponentiation

ny
n2 444830281
n3 9381915456571
n4 197873978894538961
n5 4.1733600888647E+21

Nth Root

y√n
2√n 145.22740788157
3√n 27.629035466242
4√n 12.051033477738
5√n 7.3251991162327

Divisors of 21091

1, 131, 161, 21091

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 -21090
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 21091 can be divided by 4 positive divisors. The sum of these divisors (counting 21091) is 1, the average is 0.25.

Base conversion 21091

Base System Value
2 Binary 101001001100011
3 Ternary 1001221011
4 Quaternary 11021203
5 Quinary 1133331
6 Senary 241351
8 Octal 51143
10 Decimal 21091
12 Duodecimal 10257
16 Hexadecimal 5263
20 Vigesimal 2ceb
36 Base36 g9v

Cryptographic Hash Functions

md5 bcedd7d347bfbcfdb4b8c383c3f374c7
sha1 7413ab4bcea03f7378af018b933eb20119b41ee0
sha256 50b68d6579b0ac8eb9623d5d21892ca7db596169950712186d38a248e8c7eb46
sha512 b6fd65b2e1db18473906cab8c0be9154cad8a5ec8b9a33660fbf685573bb2337a546a0ae0fc245b014d811a9c111aab280aac93b06cf0acd1a7b4745f7c8a6fe
ripemd-160 b153af4a014f1560ef00589fff943fe2f39054a2

21091 as geometric shapes

Circle

Radius = n
Diameter 42182
Circumference 132518.66131372
Area 1397475542.8839

Sphere

Radius = n
Volume 39298875566619
Surface area 5589902171.5355
Circumference 132518.66131372

Square

Length = n
Perimeter 84364
Area 444830281
Diagonal 29827.178244011

Cube

Length = n
Surface area 2668981686
Volume 9381915456571
Space diagonal 36530.683582435

Equilateral Triangle

Length = n
Perimeter 63273
Area 192617161.85929
Altitude 18265.341791218

Triangular Pyramid

Length = n
Surface area 192617161.85929
Volume 1105669339976.7
Height 9942.3927480037