Properties of the Number 49981

Forty-Nine Thousand Nine Hundred Eighty-One

Basics

Value: 49980 → 49981 → 49982

Parity: odd

Prime: No

Previous Prime: 49957

Next Prime: 49991

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 151 × 331

Divisors: 1, 151, 331, 49981

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100001100111101

Octal: 141475

Duodecimal: 24B11

Hexadecimal: c33d

Square: 2498100361

Square Root: 223.56430842153674

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

Super-Poulet numbers: Poulet numbers whose divisors d all satisfy d∣2^d-2. A50217

Fermat pseudoprimes to base 2 with two prime factors. A214305

Zsigmondy numbers for a = 4, b = 1: Zs(n, 4, 1) is the greatest divisor of 4ⁿ - 1ⁿ (A024036) that is relatively prime to 4^m - 1^m for all positive integers m < n. A64080

Numerators of coefficients for central differences M₄^2·n. A2675

Strong pseudoprimes to base 4. A20230

Odd numbers k > 1 such that 2^(k-1/2) == -(2/k) = -A091337(k) (mod k), where (2/k) is the Jacobi (or Kronecker) symbol. A306310

Cyclotomic polynomials at x=4. A19322

a(n) = 163 + 1053·n + 2520·n² + 2646·n³ + 1029·n⁴. A134160

a(n) = (∑_{k=1..A047380(n)} k⁶) / (∑_{k=1..A047380(n)} k²). A133180

a(n) = n⁸ - n⁷ + n⁵ - n⁴ + n³ - n + 1. A60889