Properties of the Number 30191

Thirty Thousand One Hundred Ninety-One

Basics

Value: 30190 → 30191 → 30192

Parity: odd

Prime: No

Previous Prime: 30187

Next Prime: 30197

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 7 × 19 × 227

Divisors: 1, 7, 19, 133, 227, 1589, 4313, 30191

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 111010111101111

Octal: 72757

Duodecimal: 1557B

Hexadecimal: 75ef

Square: 911496481

Square Root: 173.75557545011324

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) = pq + pr + qr with p = prime(n), q = prime(n+1), and r = prime(n+2). A127345

Composites in A127345. A127347

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 2, 3 or 4 king-move adjacent elements, with upper left element zero. A303888

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 2, 3, 4 or 8 king-move adjacent elements, with upper left element zero. A305281

Number of nX4 0..1 arrays with every element unequal to 0, 2, 3 or 4 king-move adjacent elements, with upper left element zero. A303884

Denominator of harmonic mean of 3 consecutive primes. Numerators are A331259. A331260

Numbers k such that σ(k) = φ(k) + φ(k-1). A67198

Least k such that k(k+1)(k+2)...(k+n) divides C(2k,k). A72119

Scaled Chebyshev U-polynomial evaluated at sqrt(5)/2. A30191

Numbers that are the sum of 11 positive 5th powers. A3356