161856381 (number)

161856381 is an odd 9-digits composite number following 161856380 and preceding 161856382. In scientific notation, it is written as 1.61856381 × 10^8. The sum of its digits is 39. It has a total of 2 prime factors and 4 positive divisors. There are 107904252 positive integers (up to 161856381) that are relatively prime to 161856381.

Interesting facts

Basic properties

Name

Name one hundred sixty-one million eight hundred fifty-six thousand three hundred eighty-one

Notation

Scientific notation 1.61856381 × 10^8
Engineering notation 1.61856381 × 10^6

Prime Factorization of 161856381

Prime Factorization 3 × 53952127

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 161856381
Product of the distinct prime numbers

The prime factorization of 161856381 is 3 × 53952127. Since it has a total of 2 prime factors.

Most popular turbo-numbers

4, 8, 36, 32, 125, 990, 8235, 1768, 58972, 78330, 386867, 264606, 4474090, 4924049, 30733472, 4440806, 566533050, 785516680, 231226681, 7707539453

Basic calculations (n = 161856381)

Multiplication

n×y
n×2 323712762
n×3 485569143
n×4 647425524
n×5 809281905

Division

n÷y
n÷2 80928190.5
n÷3 53952127
n÷3 40464095.25
n÷5 32371276.2

Exponentiation

ny
n2 26197488070417161
n3 4.2402306103684E+24
n4 6.8630838119965E+32
n5 1.1108339083094E+41

Nth Root

y√n
2√n 12722.278923212
3√n 544.97503575015
4√n 112.79308012113
5√n 43.835500052811

Divisors of 161856381

1, 3, 53952127, 161856381

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 -161856380
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 161856381 can be divided by 4 positive divisors. The sum of these divisors (counting 161856381) is 1, the average is 0.25.

Base conversion 161856381

Base System Value
2 Binary 1001101001011011101101111101
3 Ternary 102021120011012210
4 Quaternary 21221123231331
5 Quinary 312413401011
6 Senary 24021051033
8 Octal 1151335575
10 Decimal 161856381
12 Duodecimal 46256a79
16 Hexadecimal 9a5bb7d
20 Vigesimal 2abc0j1
36 Base36 2od56l

Cryptographic Hash Functions

md5 ddd4cae01c198965d80a8604fc68222e
sha1 f40651ce932bf255613af46db79a3d69a59b6a23
sha256 8c46ab3d6c0e923de9118fa7c0235cb6e50ac321fba4a13c2193bd5d2987be72
sha512 34609f7767a2c2af35fd19cd535813f4787233da18a711457ce9e8b678401e94024d95e284bfff98169ec9298f24f85c54b9fa7f3ed758996694ec654786f755
ripemd-160 6967dc5dd10fc2c98c01e0b740db6e7496d8d998

161856381 as geometric shapes

Circle

Radius = n
Diameter 323712762
Circumference 1016973634.9725
Area 8.2301836064529E+16

Sphere

Radius = n
Volume 1.7761436446747E+25
Surface area 3.2920734425812E+17
Circumference 1016973634.9725

Square

Length = n
Perimeter 647425524
Area 26197488070417161
Diagonal 228899489.16683

Cube

Length = n
Surface area 157184928422502966
Volume 4.2402306103684E+24
Space diagonal 280343475.42123

Equilateral Triangle

Length = n
Perimeter 485569143
Area 1.1343845092161E+16
Altitude 140171737.71061

Triangular Pyramid

Length = n
Surface area 1.1343845092161E+16
Volume 4.9971596973104E+23
Height 76299829.722276