Properties of the Number 21236

Twenty-One Thousand Two Hundred Thirty-Six

Basics

Value: 21235 → 21236 → 21237

Parity: even

Prime: No

Previous Prime: 21227

Next Prime: 21247

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 5309

Divisors: 1, 2, 4, 5309, 10618, 21236

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001011110100

Octal: 51364

Duodecimal: 10358

Hexadecimal: 52f4

Square: 450967696

Square Root: 145.72576985557495

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 partitions of n such that the least part occurs exactly twice. A96373

Number of integer partitions of n whose negated first differences (assuming the last part is zero) are not unimodal. A332744

Numbers k such that in k and k² the parity of digits alternates. A30153

p-INVERT of A079977, where p(S) = 1 - S - S². A289845

Triangle read by rows: T(n,k) (1 <= k <= n) = number of n X k Baxter matrices in which all row sums are 1. A347678

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (-1, 0, 1), (0, 0, -1), (0, 1, 1), (1, -1, 1)}. A148964

Nonsquarefree modified exponential abundant numbers: nonsquarefree numbers k such that A241405(k) > 2·k. A379030

Number of (3+1)X(n+1) arrays of permutations of 0..n·4+3 with each element having directed index change 0,0 0,1 1,0 or -1,-2. A264287

Decimal expansion of 1/232. A21236