Properties of the Number 20225

Twenty Thousand Two Hundred Twenty-Five

Basics

Value: 20224 → 20225 → 20226

Parity: odd

Prime: No

Previous Prime: 20219

Next Prime: 20231

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 5 ² × 809

Divisors: 1, 5, 25, 809, 4045, 20225

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100111100000001

Octal: 47401

Duodecimal: B855

Hexadecimal: 4f01

Square: 409050625

Square Root: 142.21462653327893

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 integer compositions of n with no maximal runs of the form (k)^k for any k. A389508

Column 0 of triangle A107667. A107668

Structured hexagonal diamond numbers (vertex structure 5). A100178

Triangular matrix T, read by rows, that satisfies: T = D + SHIFT_LEFT(T²) where SHIFT_LEFT shifts each row 1 place to the left and D is the diagonal matrix {1, 2, 3, ...}. A107667

Number of partitions p of n such that 2·min(p) is a part of p. A238589

T(n,k) = V(n,k)/k!, where V(n,k) = k^n·k - ∑_t=1..k-1 binomial(k,t)*k^n*(k-t)*V(n,t) for n, k >= 1; square array T read by upwards antidiagonals. A342202

Numbers that define integer Heronian triangles [prime(a(n)), prime(a(n)+1), A068965(n)] with area A068966(n). A68964

Matrix square of triangle A107667. A107670

Number of simple graphs on n vertices with each component regular. A165647

Concatenate n-th composite number with concatenation of its prime factors in ascending order. A245315