Properties of the Number 16621

Sixteen Thousand Six Hundred Twenty-One

Basics

Value: 16620 → 16621 → 16622

Parity: odd

Prime: No

Previous Prime: 16619

Next Prime: 16631

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 11 × 1511

Divisors: 1, 11, 1511, 16621

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100000011101101

Octal: 40355

Duodecimal: 9751

Hexadecimal: 40ed

Square: 276257641

Square Root: 128.9224573144648

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

T(n,k)=Number of length n+4 0..k arrays with some pair in every consecutive five terms totalling exactly k. A246892

Number of ordered triples (i,j,k) with |i|, |j|, |k|, |i·j*k| <= n. A226359

Number of polyominoes with n cells that tile the plane by translation. A75198

Nonprime numbers with all divisors starting and ending with digit 1. A208261

Composite numbers k with its divisors having the property that the last digit of every divisor is the same as the first digit of the next divisor. A307858

Composite numbers whose prime factors contain no digits other than 1 and 5. A36305

Decimal part of a(n)^1/3 starts with reversal of its integer part: first term of runs. A34309

Smallest integer k such that 2ⁿ is the largest power of two that is contained in 2^k as a proper substring. A46300

Values of n such that L(14) and N(14) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A227517

Number of length n+4 0..2 arrays with some pair in every consecutive five terms totalling exactly 2. A246886