Properties of the Number -31661

Thirty-One Thousand Six Hundred Sixty-One

Basics

Value: -31662 → -31661 → -31660

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 7 × 4523

Divisors: 1, 7, 4523, 31661

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111101110101101

Octal: -75655

Duodecimal: -163A5

Hexadecimal: -7bad

Square: 1002418921

Square Root: 177.93538152936307

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

T(n,k) = Number of (n+1) X (k+1) 0..2 arrays with the maximum minus the lower median of every 2 X 2 subblock equal. A237850

E.g.f. A(x) satisfies A(x) = 1/( 1 - A(x) * sin(x·A(x)) ). A381182

Number of (n+1)X(2+1) 0..2 arrays with the maximum minus the lower median of every 2X2 subblock equal. A237844

Number of (n+1)X(3+1) 0..2 arrays with the maximum minus the lower median of every 2X2 subblock equal. A237845

Number of trees on n nodes with forbidden limbs. A14281