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

81581490 (number)

81581490 is an even 8-digits composite number following 81581489 and preceding 81581491. In scientific notation, it is written as 8.1581490 × 10^7. The sum of its digits is 36. It has a total of 3 prime factors and 8 positive divisors. There are 21755040 positive integers (up to 81581490) that are relatively prime to 81581490.

Interesting facts

81581490 has 8 divisors, whose sum is 125091756
The reverse of 81581490 is 09418518
Previous prime number is 45

Basic properties

Is Prime? no
Number parity even
Number length 8
Sum of Digits 36
Digital Root 9

Name

Name	eighty-one million five hundred eighty-one thousand four hundred ninety

Notation

Scientific notation	8.1581490 × 10^7
Engineering notation	8.1581490 × 10^6

Prime Factorization of 81581490

Prime Factorization 2 × 45 × 906461

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81581490	Product of the distinct prime numbers

The prime factorization of 81581490 is 2 × 45 × 906461. Since it has a total of 3 prime factors.

Most popular turbo-numbers

6, 5, 79, 84, 310, 377, 1998, 6517, 1514, 77665, 40454, 891956, 7108414, 2549059, 75651670, 97574633, 401710937, 619269887, 8160476264, 5408555388

Basic calculations (n = 81581490)

Multiplication

n×y

n×2	163162980
n×3	244744470
n×4	326325960
n×5	407907450

Division

n÷y

n÷2	40790745
n÷3	27193830
n÷3	20395372.5
n÷5	16316298

Exponentiation

n^y

n²	6655539510620100
n³	5.4296883003026E+23
n⁴	4.4296206177425E+31
n⁵	3.6137505013016E+39

Nth Root

^y√n

²√n	9032.2472286801
³√n	433.70777825422
⁴√n	95.038135654484
⁵√n	38.222432871443

Divisors of 81581490

1, 2, 45, 90, 906461, 1812922, 40790745, 81581490

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	-81581489	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 81581490 can be divided by 8 positive divisors. The sum of these divisors (counting 81581490) is 1, the average is 0.125.

Base conversion 81581490

Base	System	Value
2	Binary	100110111001101010110110010
3	Ternary	12200111202202200
4	Quaternary	10313031112302
5	Quinary	131341101430
6	Senary	12032324030
8	Octal	467152662
10	Decimal	81581490
12	Duodecimal	233a3616
16	Hexadecimal	4dcd5b2
20	Vigesimal	159hdea
36	Base36	1ckkoi

Cryptographic Hash Functions

md5	c1915ab433118efd111fd4610f2707c1
sha1	2774f5a619fa020e65f7979e26a721ecb1da2636
sha256	a60c52c9c22f50ce15e789b5faf3cf7fdc9374afe5a2f9764a1fb8d4ba8b8086
sha512	9f6b7c0bc8816be8ef5578dab4d98894eb75510af5c1c7e683d29cd16490841fb933b03ae60fd20d588b410cdc59eb31e7cb24d58d15bef8abad9326895f5520
ripemd-160	bcce8703455ca9e2a65cd2fd888cc6853105da93

81581490 as geometric shapes

Circle

Radius = n

Diameter	163162980
Circumference	512591619.30582
Area	2.0908994032241E+16

Sphere

Radius = n

Volume	2.2743825167351E+24
Surface area	8.3635976128963E+16
Circumference	512591619.30582

Square

Length = n

Perimeter	326325960
Area	6655539510620100
Diagonal	115373649.59661

Cube

Length = n

Surface area	39933237063720600
Volume	5.4296883003026E+23
Space diagonal	141303285.63717

Equilateral Triangle

Length = n

Perimeter	244744470
Area	2.881933146044E+15
Altitude	70651642.818586

Triangular Pyramid

Length = n

Surface area	2.881933146044E+15
Volume	6.398949028122E+22
Height	38457883.198868