Properties of the Number 21959

Twenty-One Thousand Nine Hundred Fifty-Nine

Basics

Value: 21958 → 21959 → 21960

Parity: odd

Prime: No

Previous Prime: 21943

Next Prime: 21961

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 7 × 3137

Divisors: 1, 7, 3137, 21959

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101010111000111

Octal: 52707

Duodecimal: 1085B

Hexadecimal: 55c7

Square: 482197681

Square Root: 148.18569431628683

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

Engel series expansion (or "Egyptian product") for Catalan's constant G. A54543

a(n) = n³ + 7. A84377

Members of 3-cycles of permutation A111273. A113701

Poincaré series (or Poincare series) of Lie algebra associated with a certain braid group. A7994

Number of permutations of length n which avoid the patterns 1243, 2341, 4321. A116825

Number of compositions of n into parts of sizes == 1 mod 5 or 4 mod 5. A116975

Numbers k such that either k or k+1 is divisible by the numbers from 1 to 10. A131663

Number of n-digit semiprimes with semiprime digits (4, 6, 9). A254715

a(n) is the number of primes between (prime(n))³ and (prime(n+1))³. A365767

a(n) is the smallest divisor of triangular number T(n) := n(n+1)/2 not already in the sequence. A111273