161981815 (number)

161981815 is an odd 9-digits composite number following 161981814 and preceding 161981816. In scientific notation, it is written as 1.61981815 × 10^8. The sum of its digits is 40. It has a total of 2 prime factors and 4 positive divisors. There are 129585448 positive integers (up to 161981815) that are relatively prime to 161981815.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 1.61981815 × 10^8
Engineering notation 1.61981815 × 10^6

Prime Factorization of 161981815

Prime Factorization 5 × 32396363

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 161981815
Product of the distinct prime numbers

The prime factorization of 161981815 is 5 × 32396363. Since it has a total of 2 prime factors.

Most popular turbo-numbers

6, 9, 90, 89, 313, 525, 4265, 7687, 63544, 42168, 413713, 833997, 4906422, 1441041, 80049530, 20526399, 282464239, 119615250, 1381976180, 5017057641

Basic calculations (n = 161981815)

Multiplication

n×y
n×2 323963630
n×3 485945445
n×4 647927260
n×5 809909075

Division

n÷y
n÷2 80990907.5
n÷3 53993938.333333
n÷3 40495453.75
n÷5 32396363

Exponentiation

ny
n2 26238108390694225
n3 4.2500964192914E+24
n4 6.8843833192182E+32
n5 1.1151449052027E+41

Nth Root

y√n
2√n 12727.207667042
3√n 545.11577934686
4√n 112.81492661453
5√n 43.842292195836

Divisors of 161981815

1, 5, 32396363, 161981815

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 -161981814
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 161981815 can be divided by 4 positive divisors. The sum of these divisors (counting 161981815) is 1, the average is 0.25.

Base conversion 161981815

Base System Value
2 Binary 1001101001111010010101110111
3 Ternary 102021210112021111
4 Quaternary 21221322111313
5 Quinary 312431404230
6 Senary 24023455451
8 Octal 1151722567
10 Decimal 161981815
12 Duodecimal 462b7587
16 Hexadecimal 9a7a577
20 Vigesimal 2ac7eaf
36 Base36 2oftyv

Cryptographic Hash Functions

md5 b04ca2a808ca8ebaae75bc8009cbd334
sha1 4479bb2e196822c7cc12d79489a9a8fd072c451a
sha256 cfb312939e9574469dc2b085a9a06a877815de3376c86fe29f2169ee7b084443
sha512 446366bf9ef56eb7111aeaad8812cbe56f07e98edf6a1543e1a8ca0cdd159dc7fa8d902c8dcd9591ec00f5345972deaf28920e428d69b5443df96deb0040e94a
ripemd-160 e70387474064cc4beb3ba20c3a0109cd49283c43

161981815 as geometric shapes

Circle

Radius = n
Diameter 323963630
Circumference 1017761760.0383
Area 8.2429448564298E+16

Sphere

Radius = n
Volume 1.7802762250525E+25
Surface area 3.2971779425719E+17
Circumference 1017761760.0383

Square

Length = n
Perimeter 647927260
Area 26238108390694225
Diagonal 229076879.63081

Cube

Length = n
Surface area 157428650344165350
Volume 4.2500964192914E+24
Space diagonal 280560733.48222

Equilateral Triangle

Length = n
Perimeter 485945445
Area 1.1361434206795E+16
Altitude 140280366.74111

Triangular Pyramid

Length = n
Surface area 1.1361434206795E+16
Volume 5.0087866646293E+23
Height 76358959.876937