Properties of the Number 22021

Twenty-Two Thousand Twenty-One

Basics

Value: 22020 → 22021 → 22022

Parity: odd

Prime: No

Previous Prime: 22013

Next Prime: 22027

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 19 ² × 61

Divisors: 1, 19, 61, 361, 1159, 22021

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 101011000000101

Octal: 53005

Duodecimal: 108B1

Hexadecimal: 5605

Square: 484924441

Square Root: 148.39474384222643

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

Partial sum of centered tetrahedral numbers A005894. A132366

Starts for strings of at least five consecutive nonsquarefree numbers. A78144

Templates for lunar primes in any base (version 1). A171750

Primes of form 4k+3 written in base 3. A72805

Composite numbers for which A324644(n)/A324198(n) = 2 and σ(n) == 2 (mod 4). A371082

Iterations at which Langton's Ant living on triangular tiling reaches the distance of n from the origin for the first time. A275303

Last term where no prime sums occur in A161190 in a 4-diagonal set of 24 terms. A161193

Numbers that require three steps to collapse to a single digit in base 4 (written in base 4). A253953

Numbers k such that k, k+2, k+4 are of the form p²*q where p and q are distinct primes. A308735

Numbers k such that (k*(k+1)*(k+2)) / (k+(k+1)+(k+2)) is a palindrome. A32789