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

81985655 (number)

81985655 is an odd 8-digits composite number following 81985654 and preceding 81985656. In scientific notation, it is written as 8.1985655 × 10^7. The sum of its digits is 47. It has a total of 3 prime factors and 8 positive divisors. There are 65377728 positive integers (up to 81985655) that are relatively prime to 81985655.

Interesting facts

81985655 has 8 divisors, whose sum is 98698992
The reverse of 81985655 is 55658918
Previous prime number is 313

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 47
Digital Root 2

Name

Name	eighty-one million nine hundred eighty-five thousand six hundred fifty-five

Notation

Scientific notation	8.1985655 × 10^7
Engineering notation	8.1985655 × 10^6

Prime Factorization of 81985655

Prime Factorization 5 × 313 × 52387

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81985655	Product of the distinct prime numbers

The prime factorization of 81985655 is 5 × 313 × 52387. Since it has a total of 3 prime factors.

Most popular turbo-numbers

8, 4, 90, 80, 402, 401, 6578, 1477, 71543, 15172, 731383, 378548, 9197841, 4570466, 93493226, 68062589, 78131854, 857784114, 8557456800, 9654363946

Basic calculations (n = 81985655)

Multiplication

n×y

n×2	163971310
n×3	245956965
n×4	327942620
n×5	409928275

Division

n÷y

n÷2	40992827.5
n÷3	27328551.666667
n÷3	20496413.75
n÷5	16397131

Exponentiation

n^y

n²	6721647625779025
n³	5.5107868327869E+23
n⁴	4.5180546805141E+31
n⁵	3.7041567230776E+39

Nth Root

^y√n

²√n	9054.5930333726
³√n	434.422813121
⁴√n	95.15562533751
⁵√n	38.260229796678

Divisors of 81985655

1, 5, 313, 1565, 52387, 261935, 16397131, 81985655

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	-81985654	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 81985655 can be divided by 8 positive divisors. The sum of these divisors (counting 81985655) is 1, the average is 0.125.

Base conversion 81985655

Base	System	Value
2	Binary	100111000110000000001110111
3	Ternary	12201021022011202
4	Quaternary	10320300001313
5	Quinary	131442020110
6	Senary	12045123115
8	Octal	470600167
10	Decimal	81985655
12	Duodecimal	2355949b
16	Hexadecimal	4e30077
20	Vigesimal	15c842f
36	Base36	1ct8jb

Cryptographic Hash Functions

md5	d35c35285e6da68a5f381b32c542e24c
sha1	fe4a9b6d49fce9a76a7a234e2d31042597a0bd41
sha256	f439c88e5e87c184eca0ab672f6eff3b5d05c196a2d3148f62835b182c16480f
sha512	86e1f9df9385de72e1ede264406da4567e13a35f19c89d29d3aa8b582b4d6ac2a56ff2496fdceba0dea2b2db10e54703e942af2c8b445ca95128c8820dabf1cb
ripemd-160	bed1e9a5e54351e9b8190941cc0b900d6cf8e1ac

81985655 as geometric shapes

Circle

Radius = n

Diameter	163971310
Circumference	515131062.89549
Area	2.1116678801167E+16

Sphere

Radius = n

Volume	2.3083529905844E+24
Surface area	8.4466715204667E+16
Circumference	515131062.89549

Square

Length = n

Perimeter	327942620
Area	6721647625779025
Diagonal	115945225.22104

Cube

Length = n

Surface area	40329885754674150
Volume	5.5107868327869E+23
Space diagonal	142003319.95181

Equilateral Triangle

Length = n

Perimeter	245956965
Area	2.910558799606E+15
Altitude	71001659.975907

Triangular Pyramid

Length = n

Surface area	2.910558799606E+15
Volume	6.4945245652286E+22
Height	38648408.407014