Properties of the Number 16321

Sixteen Thousand Three Hundred Twenty-One

Basics

Value: 16320 → 16321 → 16322

Parity: odd

Prime: No

Previous Prime: 16319

Next Prime: 16333

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 19 × 859

Divisors: 1, 19, 859, 16321

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11111111000001

Octal: 37701

Duodecimal: 9541

Hexadecimal: 3fc1

Square: 266375041

Square Root: 127.75366922323602

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

From a Goldbach conjecture: the location of records in A185091. A2091

Odd numbers n>5 in the representation n=2·p+q, p, q prime, q minimal, at which a larger q than for any smaller n is needed. A194829 gives values of q. A194828

a(n) = sum of the first n upper twin primes. A86168

Semiprimes in A054556. A113693

T(n,k) is the total number of levels in all Dyck paths of semilength n containing exactly k path nodes; triangle T(n,k), n>=0, 1<=k<=n+1, read by rows. A371928

Numbers n such that Q(sqrt(n)) has class number 9. A218041

Sequence with a (1,-1) Somos-4 Hankel transform. A178080

Fundamental discriminants of real quadratic number fields with class number 9. A218159

Number of compositions of n if only the order of the even numbers matter. A275592

Odd composite integers m such that U(m)² == 1 (mod m) and V(m) == 6 (mod m), where U(m) and V(m) are the m-th generalized Lucas and Pell-Lucas numbers of parameters a=6 and b=-1, respectively. A337629