Properties of the Number 54405

Fifty-Four Thousand Four Hundred Five

Basics

Value: 54404 → 54405 → 54406

Parity: odd

Prime: No

Previous Prime: 54403

Next Prime: 54409

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 5 × 13 × 31

Divisors: 1, 3, 5, 9, 13, 15, 27, 31, 39, 45

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1101010010000101

Octal: 152205

Duodecimal: 27599

Hexadecimal: d485

Square: 2959904025

Square Root: 233.24879420910196

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 diagonal dissections of an n-gon into 3 regions. A33275

a(n) = (4·n³ + n² - 3·n)/2. A172073

Triangle T(n,k) read by rows of the smallest n-gonal number greater than 1 that is also k-gonal, or 0 if none exists, for 3 <= k <= n. A189216

Numbers that have exactly 7 representations as a k-gonal number, P(m,k) = m*((k-2)*m - (k-4))/2, k and m >= 3. A321157

Numbers n such that n and n+1 are differences between 2 positive cubes in at least one way. A38594

a(n) = (n-1)*(n-2)*(n+3)*(n+2)/12. A299120

Expansion of ∏_m>=1 1/(1 + m·q^m)⁵. A22697

Numbers k that divide the (left) concatenation of all numbers <= k written in base 19 (most significant digit on left). A29488

Octagonal numbers which are the sums of exactly two positive octagonal numbers. A136346

Numbers which are both decagonal and octagonal. A203624