251 (number)

251 is an odd 3-digits prime number following 250 and preceding 252. In scientific notation, it is written as 2.51 × 10^2. The sum of its digits is 8. It has a total of 1 prime factors and 2 positive divisors. There are 250 positive integers (up to 251) that are relatively prime to 251.

Interesting facts

Basic properties

Name

Name two hundred fifty-one

Notation

Scientific notation 2.51 × 10^2
Engineering notation 2.51 × 10^0

Prime Factorization of 251

Prime Factorization 251

Composite number
ω Distinct Factors 1
Total number of distinct prime factors
Ω Total Factors 1
Total number of prime factors
rad Radical 251
Product of the distinct prime numbers

The prime factorization of 251 is 251. Since it has a total of 1 prime factors.

Most popular turbo-numbers

Basic calculations (n = 251)

Multiplication

n×y
n×2 502
n×3 753
n×4 1004
n×5 1255

Division

n÷y
n÷2 125.5
n÷3 83.666666666667
n÷3 62.75
n÷5 50.2

Exponentiation

ny
n2 63001
n3 15813251
n4 3969126001
n5 996250626251

Nth Root

y√n
2√n 15.842979517755
3√n 6.3079935486633
4√n 3.9803240468277
5√n 3.019497986177

Divisors of 251

1, 251

2 divisors

τ Total Divisors 2
Total number of the positive divisors of n
σ Sum of Divisors 252
Sum of all the positive divisors of n
s Aliquot Sum 1
Sum of the proper positive divisors of n
A Arithmetic Mean 126
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 15.874507866388
Returns the nth root of the product of n divisors
H Harmonic Mean 1.9920634920635
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 251 can be divided by 2 positive divisors. The sum of these divisors (counting 251) is 252, the average is 126.

Base conversion 251

Base System Value
2 Binary 11111011
3 Ternary 100022
4 Quaternary 3323
5 Quinary 2001
6 Senary 1055
8 Octal 373
10 Decimal 251
12 Duodecimal 18b
16 Hexadecimal fb
20 Vigesimal cb
36 Base36 6z

Cryptographic Hash Functions

md5 19f3cd308f1455b3fa09a282e0d496f4
sha1 d6e3de36b09baee29613a44bada8dbc0d7202f31
sha256 c75d3f1f5bcd6914d0331ce5ec17c0db8f2070a2d4285f8e3ff11c6ca19168ff
sha512 17e3aa12dc2566199bf4800c27a87da03ac8c6aaafd984df1b9224e28461aadd1975063e0d14be7815bb3cd05aa13ce66bf0f7397bd0c45289b7865d33294d34
ripemd-160 9b10cbd54fa101d6b846561128be594cdd5f9b7c

251 as geometric shapes

Circle

Radius = n
Diameter 502
Circumference 1577.0795121021
Area 197923.47876881

Sphere

Radius = n
Volume 66238390.894629
Surface area 791693.91507524
Circumference 1577.0795121021

Square

Length = n
Perimeter 1004
Area 63001
Diagonal 354.96760415565

Cube

Length = n
Surface area 378006
Volume 15813251
Space diagonal 434.74475269979

Equilateral Triangle

Length = n
Perimeter 753
Area 27280.233231912
Altitude 217.37237634989

Triangular Pyramid

Length = n
Surface area 27280.233231912
Volume 1863609.5024508
Height 118.32253471855