Properties of the Number 81217

Eighty-One Thousand Two Hundred Seventeen

Basics

Value: 81216 → 81217 → 81218

Parity: odd

Prime: No

Previous Prime: 81203

Next Prime: 81223

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 241 × 337

Divisors: 1, 241, 337, 81217

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10011110101000001

Octal: 236501

Duodecimal: 3B001

Hexadecimal: 13d41

Square: 6596201089

Square Root: 284.98596456667826

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

Table read by rows: number of connected components of polyhedra in the quarter cubic honeycomb consisting of k tetrahedra and n-k truncated tetrahedra, up to translation, rotation, and reflection of the honeycomb, 0<=k<=n. A384486

Strong pseudoprimes to base 38. A20264

Strong pseudoprimes to base 65. A20291

Sum of all repeated parts of all partitions of n. A163986

Numbers n such that φ(n)=d₁!!*d₂!!*...*d_k!! where d₁ d₂ ... d_k is the decimal expansion of n. A139408

Greatest squarefree number not exceeding n-th prime power. A81217