Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

81921 (number)

81921 is an odd 5-digits composite number following 81920 and preceding 81922. In scientific notation, it is written as 8.1921 × 10^4. The sum of its digits is 21. It has a total of 3 prime factors and 8 positive divisors. There are 45264 positive integers (up to 81921) that are relatively prime to 81921.

Interesting facts

81921 has 8 divisors, whose sum is 88704
The reverse of 81921 is 12918
Previous prime number is 47

Basic properties

Is Prime? no
Number parity odd
Number length 5
Sum of Digits 21
Digital Root 3

Name

Name	eighty-one thousand nine hundred twenty-one

Notation

Scientific notation	8.1921 × 10^4
Engineering notation	8.1921 × 10^3

Prime Factorization of 81921

Prime Factorization 21 × 47 × 83

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81921	Product of the distinct prime numbers

The prime factorization of 81921 is 21 × 47 × 83. Since it has a total of 3 prime factors.

Most popular turbo-numbers

5, 6, 49, 5, 765, 130, 4943, 1792, 45896, 16939, 977590, 747963, 3332098, 9253151, 75764407, 98122921, 922971532, 677557887, 3516142179, 2767556332

Basic calculations (n = 81921)

Multiplication

n×y

n×2	163842
n×3	245763
n×4	327684
n×5	409605

Division

n÷y

n÷2	40960.5
n÷3	27307
n÷3	20480.25
n÷5	16384.2

Exponentiation

n^y

n²	6711050241
n³	549775946792961
n⁴	4.5038195337226E+19
n⁵	3.6895740002209E+24

Nth Root

^y√n

²√n	286.21844804275
³√n	43.430858584696
⁴√n	16.917991844269
⁵√n	9.6090189311985

Divisors of 81921

1, 21, 47, 83, 987, 1743, 3901, 81921

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	-81920	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 81921 can be divided by 8 positive divisors. The sum of these divisors (counting 81921) is 1, the average is 0.125.

Base conversion 81921

Base	System	Value
2	Binary	10100000000000001
3	Ternary	11011101010
4	Quaternary	110000001
5	Quinary	10110141
6	Senary	1431133
8	Octal	240001
10	Decimal	81921
12	Duodecimal	3b4a9
16	Hexadecimal	14001
20	Vigesimal	a4g1
36	Base36	1r7l

Cryptographic Hash Functions

md5	45871bb8652a039deda7d8990281e7cc
sha1	542267e97cf885ff7816d438893f30778be5e8c0
sha256	3a9bb2c7cf1677978203bfa1298f1f448bf61e0047cb6036b5ac53dc734a689e
sha512	84be7e519c285cc367a0921b3d4fc40d6a72117514b49d3d446462d2f9a34d14ef7a907e48ebb964564874e78b303da002ba338fc09ba40a094d1da7cd30480d
ripemd-160	f35be71ee6c7d10c6f9a133a51bb23c229ff9466

81921 as geometric shapes

Circle

Radius = n

Diameter	163842
Circumference	514724.82354946
Area	21083386134.998

Sphere

Radius = n

Volume	2.3028961007535E+15
Surface area	84333544539.99
Circumference	514724.82354946

Square

Length = n

Perimeter	327684
Area	6711050241
Diagonal	115853.78924317

Cube

Length = n

Surface area	40266301446
Volume	549775946792961
Space diagonal	141891.33420685

Equilateral Triangle

Length = n

Perimeter	245763
Area	2905969997.3898
Altitude	70945.667103425

Triangular Pyramid

Length = n

Surface area	2905969997.3898
Volume	64791716685093
Height	38617.929747722