161801981 (number)

161801981 is an odd 9-digits composite number following 161801980 and preceding 161801982. In scientific notation, it is written as 1.61801981 × 10^8. The sum of its digits is 35. It has a total of 3 prime factors and 8 positive divisors. There are 147016000 positive integers (up to 161801981) that are relatively prime to 161801981.

Interesting facts

Basic properties

Name

Name one hundred sixty-one million eight hundred one thousand nine hundred eighty-one

Notation

Scientific notation 1.61801981 × 10^8
Engineering notation 1.61801981 × 10^6

Prime Factorization of 161801981

Prime Factorization 11 × 3911 × 3761

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 161801981
Product of the distinct prime numbers

The prime factorization of 161801981 is 11 × 3911 × 3761. Since it has a total of 3 prime factors.

Most popular turbo-numbers

2, 8, 59, 100, 910, 548, 5319, 6366, 88178, 52770, 148763, 308003, 8384828, 4068058, 63164584, 75859728, 603277362, 82995193, 5537815394, 9747781101

Basic calculations (n = 161801981)

Multiplication

n×y
n×2 323603962
n×3 485405943
n×4 647207924
n×5 809009905

Division

n÷y
n÷2 80900990.5
n÷3 53933993.666667
n÷3 40450495.25
n÷5 32360396.2

Exponentiation

ny
n2 26179881055524361
n3 4.2359566171282E+24
n4 6.853861720814E+32
n5 1.1089684039278E+41

Nth Root

y√n
2√n 12720.1407618
3√n 544.91397345982
4√n 112.78360147557
5√n 43.832553030462

Divisors of 161801981

1, 11, 3761, 3911, 41371, 43021, 14709271, 161801981

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 -161801980
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 161801981 can be divided by 8 positive divisors. The sum of these divisors (counting 161801981) is 1, the average is 0.125.

Base conversion 161801981

Base System Value
2 Binary 1001101001001110011011111101
3 Ternary 102021110101120222
4 Quaternary 21221032123331
5 Quinary 312410130411
6 Senary 24015551125
8 Octal 1151163375
10 Decimal 161801981
12 Duodecimal 4622b4a5
16 Hexadecimal 9a4e6fd
20 Vigesimal 2ab54j1
36 Base36 2obz7h

Cryptographic Hash Functions

md5 629c654168363c4e33e3e293cbef395a
sha1 b2fee06c21afad6b5acade5759b9f959077125fa
sha256 1468dd077ad2b5f683703c338a4213399f1862c95d2fe37d13dd49cbe464152a
sha512 35cb2b97cd6dd5d63874aed8d1ff926158dece15a215c0c86e7aec685429b15dd632def0c3e4367bdae56e31c2277e8461dd86b6bc329d7854dc3d1dfd31cb15
ripemd-160 ab39ddf97c37816463c4a4b9e122744db1323d2b

161801981 as geometric shapes

Circle

Radius = n
Diameter 323603962
Circumference 1016631829.6918
Area 8.224652199589E+16

Sphere

Radius = n
Volume 1.7743533585727E+25
Surface area 3.2898608798356E+17
Circumference 1016631829.6918

Square

Length = n
Perimeter 647207924
Area 26179881055524361
Diagonal 228822555.94903

Cube

Length = n
Surface area 157079286333146166
Volume 4.2359566171282E+24
Space diagonal 280249251.85729

Equilateral Triangle

Length = n
Perimeter 485405943
Area 1.133622103107E+16
Altitude 140124625.92865

Triangular Pyramid

Length = n
Surface area 1.133622103107E+16
Volume 4.9921227479723E+23
Height 76274185.316345