Properties of the Number -21712

Twenty-One Thousand Seven Hundred Twelve

Basics

Value: -21713 → -21712 → -21711

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 13

Digital Root: 4

Palindrome: Yes

Factorization: 2 ⁴ × 23 × 59

Divisors: 1, 2, 4, 8, 16, 23, 46, 59, 92, 118

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101010011010000

Octal: -52320

Duodecimal: -10694

Hexadecimal: -54d0

Square: 471410944

Square Root: 147.3499236511509

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

Triangular sequence from coefficients of characteristic polynomial of n X n prime element matrices: M=A.B.A^-1; (A(3) is singular): examples; A(4)= {{2, 3, 5, 7, 11}, {3, 5, 7, 11, 13}, {5, 7, 11, 13, 17}, {7, 11, 13, 17, 19}, {11, 13, 17, 19, 23}} B(4)= {{3, 5, 7, 11, 13}, {5, 7, 11, 13, 17}, {7, 11, 13, 17, 19}, {11, 13, 17, 19, 23}, {13, 17, 19, 23, 29}}. A137405

Difference between larger and smaller terms of n-th amicable pair. A66539

Palindromic and divisible by 8. A45643

Number of binary strings of length n with no substrings equal to 0001 or 0010. A164392

Base-10 palindromes that start with 2. A43037

Palindromes with exactly 6 prime factors (counted with multiplicity). A46332

Cubeful (i.e., not cubefree) palindromes. A35133

Palindromic numbers which are sum of consecutive squares. A180436

Indices of records of A388038. A388263

Palindromes which are sums of two consecutive primes. A162571