Properties of the Number -2381

Three Hundred Eighty-One

Basics

Value: -2382 → -2381 → -2380

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2381

Divisors: 1, 2381

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100101001101

Octal: -4515

Duodecimal: -1465

Hexadecimal: -94d

Square: 5669161

Square Root: 48.79549159502341

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

Coefficients in an asymptotic expansion of sequence A003319. A260503

Let sum(k>=0, kⁿ/(2·k+1)!) = (x(n)*e + y(n)/e)/z(n), where x(n) and z(n) are >0, then a(n)=y(n). A80094

Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of f(i,j)=max(ceiling(i/j),ceiling(j/i)) (as in A204143). A204144

Values of n such that L(2) and N(2) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A226922

Values of n such that L(14) and N(14) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A227517

a(n) = 8·n³ - 449·n² + 7967·n - 45523. A253045

Centered square numbers: a(n) = 2·n*(n+1)+1. Sums of two consecutive squares. Also, consider all Pythagorean triples (X, Y, Z=Y+1) ordered by increasing Z; then sequence gives Z values. A1844

Numbers k such that 3^k - 2^k is prime. A57468

Numbers n such that (19ⁿ - 2ⁿ)/17 is prime. A229542

Number of integer partitions of n whose product of parts is >= n. A319005