Properties of the Number 21223

Twenty-One Thousand Two Hundred Twenty-Three

Basics

Value: 21222 → 21223 → 21224

Parity: odd

Prime: No

Previous Prime: 21221

Next Prime: 21227

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 19 × 1117

Divisors: 1, 19, 1117, 21223

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001011100111

Octal: 51347

Duodecimal: 10347

Hexadecimal: 52e7

Square: 450415729

Square Root: 145.68115869940078

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 unimodal partitions/compositions of n into distinct terms. A72706

Numbers that are the sum of 8 positive 9th powers. A3397

Every suffix is prime and contains no 0 digits in base 4 (written in base 4). A24779

Number of partitions p of n such that (maximal multiplicity of the parts of p) >= (number of distinct parts of p). A240308

Number of rooted trees with total weight n, where the weight of a node at height k is k (with the root considered to be at level 0). A117356

Rectangular array read by downwards antidiagonals: row k lists the numbers whose Lucas-Fibonacci representation has k terms. A353659

a(n) = n³ - floor(n/3)³. A213039

a(n) = (n+1)³ - n². A261893

Number of nX6 0..1 arrays with every element unequal to 0, 1 or 2 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A317762

Start with 1 and repeatedly reverse the digits and add 37 to get the next term. A118633