81285369 (number)

81285369 is an odd 8-digits composite number following 81285368 and preceding 81285370. In scientific notation, it is written as 8.1285369 × 10^7. The sum of its digits is 42. It has a total of 4 prime factors and 16 positive divisors. There are 48885200 positive integers (up to 81285369) that are relatively prime to 81285369.

Interesting facts

Basic properties

Name

Name eighty-one million two hundred eighty-five thousand three hundred sixty-nine

Notation

Scientific notation 8.1285369 × 10^7
Engineering notation 8.1285369 × 10^6

Prime Factorization of 81285369

Prime Factorization 3 × 11 × 131 × 18803

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81285369
Product of the distinct prime numbers

The prime factorization of 81285369 is 3 × 11 × 131 × 18803. Since it has a total of 4 prime factors.

Most popular turbo-numbers

2, 7, 71, 42, 470, 787, 5610, 2210, 12754, 87542, 724692, 651549, 4443188, 5177981, 19411620, 11285172, 816639929, 802394161, 6288258781, 2112635983

Basic calculations (n = 81285369)

Multiplication

n×y
n×2 162570738
n×3 243856107
n×4 325141476
n×5 406426845

Division

n÷y
n÷2 40642684.5
n÷3 27095123
n÷3 20321342.25
n÷5 16257073.8

Exponentiation

ny
n2 6607311213466161
n3 5.3707773008443E+23
n4 4.3656561471596E+31
n5 3.5486397084898E+39

Nth Root

y√n
2√n 9015.8398943193
3√n 433.18239075518
4√n 94.951776678056
5√n 38.1946448665

Divisors of 81285369

1, 3, 11, 33, 131, 393, 1441, 4323, 18803, 56409, 206833, 620499, 2463193, 7389579, 27095123, 81285369

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81285368
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81285369 can be divided by 16 positive divisors. The sum of these divisors (counting 81285369) is 1, the average is 0.0625.

Base conversion 81285369

Base System Value
2 Binary 100110110000101000011111001
3 Ternary 12122221201120020
4 Quaternary 10312011003321
5 Quinary 131302112434
6 Senary 12022121053
8 Octal 466050371
10 Decimal 81285369
12 Duodecimal 23280189
16 Hexadecimal 4d850f9
20 Vigesimal 1580d89
36 Base36 1ce86x

Cryptographic Hash Functions

md5 e417192e36b253b52ef651931f81dad8
sha1 1130eb7db5f9196e57e05fdf077ed6c1c581464c
sha256 5310263d626f2fc0025b5dad28ae6f0e147a9c196f5f1e31d26d47d290b784bb
sha512 73fabf1100a846ee5a50af735acd79ec0c5fc3f5033f9586661bc495b42782140fb53026def96b7a4a505f0e9bfddadfce1a82f4dc0c67861d6e8e7b044baed6
ripemd-160 dffe4df1064a1db3e515540c3b5a80e17fd7f994

81285369 as geometric shapes

Circle

Radius = n
Diameter 162570738
Circumference 510731036.18947
Area 2.0757480368207E+16

Sphere

Radius = n
Volume 2.2497059349866E+24
Surface area 8.3029921472827E+16
Circumference 510731036.18947

Square

Length = n
Perimeter 325141476
Area 6607311213466161
Diagonal 114954871.2623

Cube

Length = n
Surface area 39643867280796966
Volume 5.3707773008443E+23
Space diagonal 140790389.01998

Equilateral Triangle

Length = n
Perimeter 243856107
Area 2.8610496807857E+15
Altitude 70395194.509992

Triangular Pyramid

Length = n
Surface area 2.8610496807857E+15
Volume 6.3295217494497E+22
Height 38318290.420767