Properties of the Number 13811

Thirteen Thousand Eight Hundred Eleven

Basics

Value: 13810 → 13811 → 13812

Parity: odd

Prime: No

Previous Prime: 13807

Next Prime: 13829

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 7 × 1973

Divisors: 1, 7, 1973, 13811

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 11010111110011

Octal: 32763

Duodecimal: 7BAB

Hexadecimal: 35f3

Square: 190743721

Square Root: 117.52021102772068

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

Numbers n such that σ(reverse(n)) = φ(n). A70856

Numbers n such that φ(n)=reversal(n)+1. A137598

Number of partitions of 3n into at most 5 parts. A256525

Number of partitions of 4n into at most 5 parts. A256539

a(n) is the smallest k such that A261786(k) >= 3ⁿ. A261788

Expansion of (1-x)/(1 - x - x³ - 2·x⁴ + 2·x⁵). A52914

Numbers k such that (67·10^k-1 + 23)/9 is a depression prime. A82712

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 334", based on the 5-celled von Neumann neighborhood. A271283

Number of nX5 0..1 arrays with every element unequal to 0, 1, 3, 4 or 8 king-move adjacent elements, with upper left element zero. A305249

Numbers k such that 30·k - 1, 30·k + 1, 30·k² - 1 and 30·k² + 1 are all prime. A359184