15981 (number)

15981 is an odd 5-digits composite number following 15980 and preceding 15982. In scientific notation, it is written as 1.5981 × 10^4. The sum of its digits is 24. It has a total of 3 prime factors and 8 positive divisors. There are 9120 positive integers (up to 15981) that are relatively prime to 15981.

Interesting facts

Basic properties

Name

Name fifteen thousand nine hundred eighty-one

Notation

Scientific notation 1.5981 × 10^4
Engineering notation 1.5981 × 10^3

Prime Factorization of 15981

Prime Factorization 3 × 7 × 761

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 15981
Product of the distinct prime numbers

The prime factorization of 15981 is 3 × 7 × 761. Since it has a total of 3 prime factors.

Most popular turbo-numbers

10, 2, 17, 46, 567, 260, 4963, 8255, 51783, 72867, 206326, 37466, 4870303, 8831543, 89007743, 99812141, 441979125, 863217039, 2341473126, 1841636947

Basic calculations (n = 15981)

Multiplication

n×y
n×2 31962
n×3 47943
n×4 63924
n×5 79905

Division

n÷y
n÷2 7990.5
n÷3 5327
n÷3 3995.25
n÷5 3196.2

Exponentiation

ny
n2 255392361
n3 4081425321141
n4 65225258057154321
n5 1.0423648490114E+21

Nth Root

y√n
2√n 126.41598000253
3√n 25.188442672122
4√n 11.243486114303
5√n 6.9298014300373

Divisors of 15981

1, 3, 7, 21, 761, 2283, 5327, 15981

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 -15980
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 15981 can be divided by 8 positive divisors. The sum of these divisors (counting 15981) is 1, the average is 0.125.

Base conversion 15981

Base System Value
2 Binary 11111001101101
3 Ternary 210220220
4 Quaternary 3321231
5 Quinary 1002411
6 Senary 201553
8 Octal 37155
10 Decimal 15981
12 Duodecimal 92b9
16 Hexadecimal 3e6d
20 Vigesimal 1jj1
36 Base36 cbx

Cryptographic Hash Functions

md5 a1c9a80b51fb1a982b13329a1dc58f95
sha1 b845ffcc1dc68d8f0cc529934b8e457a0a483af9
sha256 6bfa3aa7296f7a3a13382e3b2988be28ec15e1926b18b3c524882e280baa3a40
sha512 dbaf7ede58729cc2742efe5c436535c0d313be62d3cbe61ffed1d016be7187ff486cad617145647d275a6b23b881f6849afd517d32bddcac36f805a11e6d9aa5
ripemd-160 9adc35c3d9b75e8d2bb2747a5848000e89537aaa

15981 as geometric shapes

Circle

Radius = n
Diameter 31962
Circumference 100411.58439404
Area 802338765.10055

Sphere

Radius = n
Volume 17096234406763
Surface area 3209355060.4022
Circumference 100411.58439404

Square

Length = n
Perimeter 63924
Area 255392361
Diagonal 22600.546940284

Cube

Length = n
Surface area 1532354166
Volume 4081425321141
Space diagonal 27679.903955758

Equilateral Triangle

Length = n
Perimeter 47943
Area 110588136.27924
Altitude 13839.951977879

Triangular Pyramid

Length = n
Surface area 110588136.27924
Volume 481000586914.21
Height 7533.5156467615