Properties of the Number -19511

Nineteen Thousand Five Hundred Eleven

Basics

Value: -19512 → -19511 → -19510

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 109 × 179

Divisors: 1, 109, 179, 19511

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100110000110111

Octal: -46067

Duodecimal: -B35B

Hexadecimal: -4c37

Square: 380679121

Square Root: 139.68178120284693

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

Numbers k such that σ(k) = σ(k+8). A15876

Number of positive integers <= 10ⁿ that are divisible by no prime exceeding 5. A106598

Number T(n,k) of permutations of [n] with exactly k (possibly overlapping) occurrences of some of the consecutive step patterns UUD, UDU, DUU (U=up, D=down); triangle T(n,k), n>=0, 0<=k<=max(0,n-3), read by rows. A231384

Unitary Ruth-Aaron numbers: numbers k such that A008475(k) = A008475(k+1). A331000

Numerators of continued fraction convergents to sqrt(429). A41816

Number of permutations of [n] avoiding simultaneously consecutive step patterns UUD, UDU, DUU (U=up, D=down). A231385

Composite numbers for which the root mean square of proper divisors is an integer. A247135

Solution of the complementary equation a(n) = 2·a(n-1) - a(n-3) + b(n-2), where a(0) = 2, a(1) = 4, a(2) = 6, b(0) = 1, b(1) = 3, b(2) = 5, and (a(n)) and (b(n)) are increasing complementary sequences. A295618

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 25 ones. A31793

a(n) = floor(eⁿ mod n^e). A66433