Properties of the Number 51584

Fifty-One Thousand Five Hundred Eighty-Four

Basics

Value: 51583 → 51584 → 51585

Parity: even

Prime: No

Previous Prime: 51581

Next Prime: 51593

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ⁷ × 13 × 31

Divisors: 1, 2, 4, 8, 13, 16, 26, 31, 32, 52

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1100100110000000

Octal: 144600

Duodecimal: 25A28

Hexadecimal: c980

Square: 2660909056

Square Root: 227.12111306525424

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

Number of homeomorphically irreducible rooted trees (also known as series-reduced rooted trees, or rooted trees without nodes of degree 2) on n labeled nodes. A60313

E.g.f.: A(x) = x/Series_Reversion(x·G(x)) where G(x) = ∑_n>=0 nⁿ*xⁿ/n!. A243954

The sequence M(n) in A022905. A22908

Positive numbers k such that (k+1)*(k+2)*(k+3)*(k+4)/(k+(k+1)+(k+2)+(k+3)+(k+4)) is an integer. A32795

a(n) = (n/2)*(n + 1)*(3·n + 11). A59997

a(n) = n*(n+1)*(5·n+1)/3. A174814

Number of integer-sided triangles of area n. A51584

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