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

81213817 (number)

81213817 is an odd 8-digits composite number following 81213816 and preceding 81213818. In scientific notation, it is written as 8.1213817 × 10^7. The sum of its digits is 31. It has a total of 2 prime factors and 4 positive divisors. There are 80185716 positive integers (up to 81213817) that are relatively prime to 81213817.

Interesting facts

81213817 has 4 divisors, whose sum is 82241920
The reverse of 81213817 is 71831218
Previous prime number is 79

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 31
Digital Root 4

Name

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

Notation

Scientific notation	8.1213817 × 10^7
Engineering notation	8.1213817 × 10^6

Prime Factorization of 81213817

Prime Factorization 79 × 1028023

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	81213817	Product of the distinct prime numbers

The prime factorization of 81213817 is 79 × 1028023. Since it has a total of 2 prime factors.

Most popular turbo-numbers

3, 3, 68, 47, 95, 722, 5139, 266, 94961, 78863, 517165, 89186, 7603482, 8541639, 79163265, 67848692, 272221482, 8867266, 3759508370, 6217130558

Basic calculations (n = 81213817)

Multiplication

n×y

n×2	162427634
n×3	243641451
n×4	324855268
n×5	406069085

Division

n÷y

n÷2	40606908.5
n÷3	27071272.333333
n÷3	20303454.25
n÷5	16242763.4

Exponentiation

n^y

n²	6595684071709489
n³	5.3566067918963E+23
n⁴	4.3503048373802E+31
n⁵	3.5330486095721E+39

Nth Root

^y√n

²√n	9011.8708934383
³√n	433.05524952508
⁴√n	94.930874289866
⁵√n	38.187918278347

Divisors of 81213817

1, 79, 1028023, 81213817

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	-81213816	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 81213817 can be divided by 4 positive divisors. The sum of these divisors (counting 81213817) is 1, the average is 0.25.

Base conversion 81213817

Base	System	Value
2	Binary	100110101110011100101111001
3	Ternary	12122211002102011
4	Quaternary	10311303211321
5	Quinary	131242320232
6	Senary	12020405521
8	Octal	465634571
10	Decimal	81213817
12	Duodecimal	232468a1
16	Hexadecimal	4d73979
20	Vigesimal	157beah
36	Base36	1ccozd

Cryptographic Hash Functions

md5	0397fbf7ea5ea169df6706b2271bc393
sha1	5f3d1c0ea62ec3d71c28726232829554ba1f1549
sha256	73968db5d46fde2200d5bc9388695b18ca594856b24e9bce3bf8c18bc2528077
sha512	e152b77063355db15cff8402794f368953f9ce05ba983b61b570e79a2b52dfc830dd23162f3d7a5086afb439340a95eae6db436efcfb1b5c8465f1bb4e7e468d
ripemd-160	58eb7c9f470b1df0b08483352769dd100d6b6eaf

81213817 as geometric shapes

Circle

Radius = n

Diameter	162427634
Circumference	510281461.71437
Area	2.0720952625082E+16

Sphere

Radius = n

Volume	2.2437702060787E+24
Surface area	8.2883810500327E+16
Circumference	510281461.71437

Square

Length = n

Perimeter	324855268
Area	6595684071709489
Diagonal	114853681.45349

Cube

Length = n

Surface area	39574104430256934
Volume	5.3566067918963E+23
Space diagonal	140666457.3206

Equilateral Triangle

Length = n

Perimeter	243641451
Area	2.8560149807184E+15
Altitude	70333228.660301

Triangular Pyramid

Length = n

Surface area	2.8560149807184E+15
Volume	6.3128216444996E+22
Height	38284560.484496