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Properties of the Number 21307

Twenty-One Thousand Three Hundred Seven

Basics

Value: 21306 → 21307 → 21308

Parity: odd

Prime: No

Previous Prime: 21283

Next Prime: 21313

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 11 × 13 × 149

Divisors: 1, 11, 13, 143, 149, 1639, 1937, 21307

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001100111011

Octal: 51473

Duodecimal: 103B7

Hexadecimal: 533b

Square: 453988249

Square Root: 145.96917482811224

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 T(n,k) of standard Young tableaux for partitions of n into distinct parts with largest part k; triangle T(n,k), k>=0, k<=n<=k*(k+1)/2, read by columns. A219274
a(n) + a(n+1) + a(n+2) = n3. A152728
Fourth accumulation array, T, of the natural number array A000027, by antidiagonals. A185509
Irregular array T(n,k) of the numbers of non-extendable (complete) non-self-adjacent simple paths incorporating each of a minimal subset of nodes within a square lattice bounded by rectangles with nodal dimensions n and 5, n >= 2. A214563
Irregular array T(n,k) of the numbers of non-extendable (complete) non-self-adjacent simple paths incorporating each of a minimal subset of nodes within a square lattice bounded by rectangles with nodal dimensions n and 6, n >= 2. A214601
Composite squarefree numbers n such that p(i)-5 divides n+5, where p(i) are the prime factors of n. A225705
Quasi-Carmichael numbers to base 7: squarefree composites n such that (n,2·3*5) = 1 and prime p∣n ==> p-7∣n-7. A29556
Record-setting differences between adjacent elements of the Mian-Chowla sequence A005282. A80222
Triangle read by rows: A219274 with rows reversed. A219356
Numbers n such that n10+10 is prime. A239347