Properties of the Number 21083

Twenty-One Thousand Eighty-Three

Basics

Value: 21082 → 21083 → 21084

Parity: odd

Prime: No

Previous Prime: 21067

Next Prime: 21089

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 29 × 727

Divisors: 1, 29, 727, 21083

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001001011011

Octal: 51133

Duodecimal: 1024B

Hexadecimal: 525b

Square: 444492889

Square Root: 145.19986225888783

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 containing a clique of size 9. A183566

Number of 9-almost primes 9ap such that 2ⁿ < 9ap <= 2ⁿ⁺¹. A120040

MM-numbers of crossing set partitions. A324324

Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = n! * ∑_{j=0..floor(n/2)} (-k/2)^j * (j+1)^n-j-1 / (j! * (n-2·j)!). A362394

Numbers whose square starts with 4 identical digits. A132391

a(n) = 25·n² + 2·n. A154377

Positive numbers y such that y² is of the form x²+(x+727)² with integer x. A159893

a(n) = ∑_j=1..n ∑_k=1..n φ(j·k) / φ(k). A372636

Consecutive states of the linear congruential pseudo-random number generator 20403·s mod 2¹⁵ when started at s=1. A384196

T(n,k)=Number of nXk 1..5 arrays with every element value z a city block distance of exactly z from another element value z. A209023