Properties of the Number 21196

Twenty-One Thousand One Hundred Ninety-Six

Basics

Value: 21195 → 21196 → 21197

Parity: even

Prime: No

Previous Prime: 21193

Next Prime: 21211

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 7 × 757

Divisors: 1, 2, 4, 7, 14, 28, 757, 1514, 3028, 5299

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001011001100

Octal: 51314

Duodecimal: 10324

Hexadecimal: 52cc

Square: 449270416

Square Root: 145.58846108122717

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

q-factorial numbers 3!_q. A69778

Even pseudoprimes to base 9. A90083

Intrinsic 10-palindromes: n is an intrinsic k-palindrome if it is a k-digit palindrome in some base. A60947

Numbers n such that n through n+5 have the same number of distinct prime factors. A45934

Pseudoprimes to base 9 that are not squarefree. A306448

Numbers k such that k and k+2 are both terms in A380846. A381073

Number of -2..2 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^t+u+v) having two, three or four distinct values for every i,j,k<=n. A211568

a(n) = m is the least m = b·c > a(n-1) such that (b+c)*n = m-1 where 1 < b <= c < m. A364171

The number of permutations of length n sortable by 3 prefix reversals (in the pancake sorting sense). A228398

Decimal expansion of 1/192. A21196