Properties of the Number 51425

Fifty-One Thousand Four Hundred Twenty-Five

Basics

Value: 51424 → 51425 → 51426

Parity: odd

Prime: No

Previous Prime: 51421

Next Prime: 51427

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 ² × 11 ² × 17

Divisors: 1, 5, 11, 17, 25, 55, 85, 121, 187, 275

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1100100011100001

Octal: 144341

Duodecimal: 25915

Hexadecimal: c8e1

Square: 2644530625

Square Root: 226.77080940897133

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Triangle where g.f. S = S(x,m) satisfies: S = x/(G(-S²)*G(-m·S²)) such that G(x) = 1 + x·G(x)² is the g.f. of the Catalan numbers (A000108), as read by rows of coefficients T(n,k) of x^2·n-1*m^k in S(x,m) for n>=1, k=0..n-1. A278880

The number of regions formed inside an isosceles triangle by straight line segments mutually connecting all vertices and all points that divide the two equal length sides into n equal parts; the base of the triangle contains no points other than its vertices. A332953

Number of double palindrome structures of length n using exactly three different symbols. A328689

Index numbers for palindromic hexagonal numbers. A54970

Partition number array, called M32hat(-5)= 'M32(-5)/M3'= 'A144268/A036040', related to A011801(n,m)= |S2(-4;n,m)| (generalized Stirling triangle). A144341

Number of ways two L-tiles can be placed on an n X n square. A243645

Positions of records in |A282695(n)| = |A055265(n)-n|. A282696

Where the number of divisors d(k) reaches a new record for numbers k whose prime factors are of the form 6·j+5. A326314

Number of partitions of n into parts but with two kinds of parts of sizes 1,2,3,4,5 and 6. A103925

a(n) = (4·n+1) * ( binomial(3·n,n)/(2·n+1) )². A278883