Properties of the Number 21227

Twenty-One Thousand Two Hundred Twenty-Seven

Basics

Value: 21226 → 21227 → 21228

Parity: odd

Prime: Yes

Previous Prime: 21221

Next Prime: 21247

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 21227

Divisors: 1, 21227

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001011101011

Octal: 51353

Duodecimal: 1034B

Hexadecimal: 52eb

Square: 450585529

Square Root: 145.69488666387713

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 12 positive 9th powers. A4801

Primes having only {1, 2, 7} as digits. A260889

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction. A250583

Primes p such that p = q² + 2·r² where q and r are also primes. A260553

Primes that remain prime through 2 iterations of function f(x) = 8x + 1. A23260

Primes of the form p² + 2q² with p and q odd primes. A201613

Discriminants of quintic fields with 2 complex conjugates (negated). A23684

Primes congruent to 60 mod 61. A142858

a(n) is the first prime p such that A329308(p) = n. A329309

Primes congruent to 46 mod 59. A142773