Properties of the Number 19230

Nineteen Thousand Two Hundred Thirty

Basics

Value: 19229 → 19230 → 19231

Parity: even

Prime: No

Previous Prime: 19219

Next Prime: 19231

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 5 × 641

Divisors: 1, 2, 3, 5, 6, 10, 15, 30, 641, 1282

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101100011110

Octal: 45436

Duodecimal: B166

Hexadecimal: 4b1e

Square: 369792900

Square Root: 138.67227552759059

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

Becomes prime after n iterations of f(x) = σ(x)-1 (least inverse of A039655). A39656

Number of T₀ set-systems covering n vertices that are closed under intersection. A309615

Number of ordered triples (w,x,y) with all terms in {1,...,n} and w³ < x³ + y³. A211650

Numbers n such that A002088(n) < 3n²/π². A285022

Number of n element multisets of the 15th roots of unity with zero sum. A321418

Take pairs (a, b), sorted on a, such that T(a)+T(b)=concatenation of a and b, where T(k) is the k-th triangular number A000217(k). Sequence gives values of a. A96031

Number of 5-divided binary words of length n. A210322

Numbers k such that σ(k)+1 is a square and sets a new record for such squares. A63729

Sequence defined by the recurrence formula a(n+1)=sum(a(p)*a(n-p)+k,p=0..n)+l for n>=1, with here a(0)=1, a(1)=9, k=0 and l=-2. A177171

G.f.: ∑_k>=0 x^k² * ∏_j=1..k 1/(1 - x^j)⁴. A376712