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

81213818 (number)

81213818 is an even 8-digits composite number following 81213817 and preceding 81213819. In scientific notation, it is written as 8.1213818 × 10^7. The sum of its digits is 32. It has a total of 3 prime factors and 8 positive divisors. There are 34805916 positive integers (up to 81213818) that are relatively prime to 81213818.

Interesting facts

81213818 has 8 divisors, whose sum is 139223712
The reverse of 81213818 is 81831218
Previous prime number is 7

Basic properties

Is Prime? no
Number parity even
Number length 8
Sum of Digits 32
Digital Root 5

Name

Name	eighty-one million two hundred thirteen thousand eight hundred eighteen

Notation

Scientific notation	8.1213818 × 10^7
Engineering notation	8.1213818 × 10^6

Prime Factorization of 81213818

Prime Factorization 2 × 7 × 5800987

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81213818	Product of the distinct prime numbers

The prime factorization of 81213818 is 2 × 7 × 5800987. Since it has a total of 3 prime factors.

Most popular turbo-numbers

9, 6, 15, 58, 434, 927, 133, 4986, 51041, 33113, 910131, 120076, 9180948, 5017512, 43273854, 26003363, 134377352, 424046923, 1314163828, 7330033421

Basic calculations (n = 81213818)

Multiplication

n×y

n×2	162427636
n×3	243641454
n×4	324855272
n×5	406069090

Division

n÷y

n÷2	40606909
n÷3	27071272.666667
n÷3	20303454.5
n÷5	16242763.6

Exponentiation

n^y

n²	6595684234137124
n³	5.3566069897668E+23
n⁴	4.3503050516445E+31
n⁵	3.5330488270874E+39

Nth Root

^y√n

²√n	9011.8709489207
³√n	433.0552513025
⁴√n	94.930874582091
⁵√n	38.18791837239

Divisors of 81213818

1, 2, 7, 14, 5800987, 11601974, 40606909, 81213818

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	-81213817	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 81213818 can be divided by 8 positive divisors. The sum of these divisors (counting 81213818) is 1, the average is 0.125.

Base conversion 81213818

Base	System	Value
2	Binary	100110101110011100101111010
3	Ternary	12122211002102012
4	Quaternary	10311303211322
5	Quinary	131242320233
6	Senary	12020405522
8	Octal	465634572
10	Decimal	81213818
12	Duodecimal	232468a2
16	Hexadecimal	4d7397a
20	Vigesimal	157beai
36	Base36	1ccoze

Cryptographic Hash Functions

md5	f1c987859f68657a142a0b0a7c78d0c1
sha1	2695b3d71416ab400db1e9d3a78a0f9c11dd1403
sha256	f5613ae16353f0c20a7ff432dff5edf858275ed937fd46ba37c95fc45e5b23e9
sha512	79761481a874650c19a379489667ddb82bedaaf46fdf5ad3c4047c02ff039d500c1937abb6c6ef21c3a80839b7899b51336dcc0cd86e57c7eb6737b44ec00452
ripemd-160	115e05bd833fc46af3516edc5bf152475c89a6e0

81213818 as geometric shapes

Circle

Radius = n

Diameter	162427636
Circumference	510281467.99756
Area	2.0720953135363E+16

Sphere

Radius = n

Volume	2.2437702889626E+24
Surface area	8.2883812541453E+16
Circumference	510281467.99756

Square

Length = n

Perimeter	324855272
Area	6595684234137124
Diagonal	114853682.8677

Cube

Length = n

Surface area	39574105404822744
Volume	5.3566069897668E+23
Space diagonal	140666459.05265

Equilateral Triangle

Length = n

Perimeter	243641454
Area	2.8560150510516E+15
Altitude	70333229.526326

Triangular Pyramid

Length = n

Surface area	2.8560150510516E+15
Volume	6.3128218776923E+22
Height	38284560.9559