Properties of the Number -30951

Thirty Thousand Nine Hundred Fifty-One

Basics

Value: -30952 → -30951 → -30950

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 19 × 181

Divisors: 1, 3, 9, 19, 57, 171, 181, 543, 1629, 3439

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111100011100111

Octal: -74347

Duodecimal: -15AB3

Hexadecimal: -78e7

Square: 957964401

Square Root: 175.928962936749

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

Place n equally spaced points on each side of an equilateral triangle, and join each of these points by a chord to the 2·n new points on the other two sides: sequence gives number of vertices in the resulting planar graph. A366483

G.f. A(x) satisfies A(x) = 1 + x·A(x)⁶/(1 + x·A(x)³). A378892

Number of nonzero palindromes of length n containing the digit '0'. A50720

Number of n-digit numbers containing the digit '0'. A229127

a(n) = floor(sqrt(2·n!)). A129960

Number of nonempty subsets of {1, 2, ..., n} with <=10 pairwise coprime elements. A187271

Let a(0)=1. Then a(n) = sums of consecutive strings of positive integers of length 3·n, starting with the integer 2. A289721