Properties of the Number 19531

Nineteen Thousand Five Hundred Thirty-One

Basics

Value: 19530 → 19531 → 19532

Parity: odd

Prime: Yes

Previous Prime: 19507

Next Prime: 19541

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 19531

Divisors: 1, 19531

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110001001011

Octal: 46113

Duodecimal: B377

Hexadecimal: 4c4b

Square: 381459961

Square Root: 139.75335416368367

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

a(n) = (5ⁿ - 1)/4. A3463

Primes of the form 1 + n + n² + n³ + ... + n^k, n > 1, k > 1. A85104

Array read by antidiagonals: T(n,k) is the number of sublattices of index n in generic k-dimensional lattice (n >= 1, k >= 1). A160870

Prime numbers that are the sum of the divisors of some n. A23195

Triangle T(n, k, m) = (m*(n-k) + 1)*T(n-1, k-1, m) + (m·k + 1)*T(n-1, k, m) - m·k*(n-k)*T(n-2, k-1, m) with T(n, 0, m) = T(n, n, m) = 1 and m = 4, read by rows. A157155

Triangle of Gaussian binomial coefficients [ n,k ] for q = 5. A22169

Repunits in different bases: table by antidiagonals of numbers written in base k as a string of n 1's. A55129

Terms of A000203 that are prime. A62700

a(n) = 1111111 in base n. A53716

Primes of the form 5k² + 5k + 1. A90562