Properties of the Number 21226

Twenty-One Thousand Two Hundred Twenty-Six

Basics

Value: 21225 → 21226 → 21227

Parity: even

Prime: No

Previous Prime: 21221

Next Prime: 21227

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 × 10613

Divisors: 1, 2, 10613, 21226

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101001011101010

Octal: 51352

Duodecimal: 1034A

Hexadecimal: 52ea

Square: 450543076

Square Root: 145.69145479402695

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

Sum of 11 positive 9th powers. A4800

Number of ways to write n as an ordered sum of 8 nonzero triangular numbers. A340953

Last occurrence of n partitions in A204814. A205301

a(n) = ∑_d∣n sigma₃(d). A321140

Expansion of ∏_m>=1 (1 - m·q^m)⁶. A22666

a(n) is the smallest number k such that d(1)*1! + d(2)*2! + ... + d(p)*p! = n², where d(i) are the decimal digits of k. A198095

Number of partitions satisfying cn(0,5) + cn(1,5) < cn(2,5) + cn(3,5) and cn(0,5) + cn(4,5) < cn(2,5) + cn(3,5). A39884

Decimal expansion of 1/222. A21226