Properties of the Number 22000

Twenty-Two Thousand

Basics

Value: 21999 → 22000 → 22001

Parity: even

Prime: No

Previous Prime: 21997

Next Prime: 22003

Digit Sum: 4

Digital Root: 4

Palindrome: No

Factorization: 2 ⁴ × 5 ³ × 11

Divisors: 1, 2, 4, 5, 8, 10, 11, 16, 20, 22

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101010111110000

Octal: 52760

Duodecimal: 10894

Hexadecimal: 55f0

Square: 484000000

Square Root: 148.32396974191326

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

Multiples of 4 whose digits add to 4. A63997

Numbers whose decimal expansion contains only 0's and 2's. A169965

4 times 9-gonal numbers: a(n) = 2·n*(7·n-5). A152760

Numbers m such that the smallest digit in the decimal expansion of 1/m is 4, ignoring leading and trailing 0's. A352158

Positive integers k = p₁^e_1·p₂^e_2·p₃^e_3, such that the points (p₁, e₁), (p₂, e₂) and (p₃, e₃) lie on a straight line with nonzero slope. A389340

Numbers of rank 11 in the poset of lunar numbers. A191753

T(n,k)=Number of ways to reciprocally link elements of an nXk array either to themselves or to exactly two horizontal, vertical and antidiagonal neighbors, without consecutive collinear links. A220681

Triangular matrix, read by rows, equal to [2·I - A008459]^-1, i.e., the matrix inverse of the difference of twice the identity matrix and the triangular matrix of squared binomial coefficients. A102220

Full Łukasiewicz word for each rooted plane tree (interpretation e in Stanley's exercise 19) encoded by A014486 (or A063171). A79436

Numbers k such that k and k² use only the digits 0, 2, 4, 6 and 8. A136904