Properties of the Number 21233

Twenty-One Thousand Two Hundred Thirty-Three

Basics

Value: 21232 → 21233 → 21234

Parity: odd

Prime: No

Previous Prime: 21227

Next Prime: 21247

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 17 × 1249

Divisors: 1, 17, 1249, 21233

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001011110001

Octal: 51361

Duodecimal: 10355

Hexadecimal: 52f1

Square: 450840289

Square Root: 145.71547618561317

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

Numbers k such that the digit sum of 167^k is divisible by k. A175552

Smallest numbers containing exactly n smaller numbers when written as English number names. A159453

Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2·w² < x² + y². A211800

G.f.: ∑_n>=0 (1 + x*(1+x)ⁿ)ⁿ * xⁿ. A337721

arcsin(arcsinh(x)*cos(x))=x-3/3!*x³-7/5!*x⁵+133/7!*x⁷+21233/9!*x⁹... A12636

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, 1), (0, 0, 1), (1, 0, -1), (1, 1, -1)}. A148854

Concatenation of the palindromic numbers (A002113) in increasing order up to the n-th term and then in decreasing order. A261570

Number of unimodal negated permutations of the multiset of prime indices of n. A333145

a(1)=1; thereafter a(n) = smallest prime factor of A261570(n). A261411

Decimal expansion of 1/229. A21233