Properties of the Number -215481

Two Hundred Fifteen Thousand Four Hundred Eighty-One

Basics

Value: -215482 → -215481 → -215480

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 7 × 31 × 331

Divisors: 1, 3, 7, 21, 31, 93, 217, 331, 651, 993

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110100100110111001

Octal: -644671

Duodecimal: -A4849

Hexadecimal: -349b9

Square: 46432061361

Square Root: 464.1993106414528

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

Expansion of e.g.f. 1/(1 - 3·x * (exp(x) - 1)). A367881

Number of compositions of 5·n-1 into parts 4 and 5. A369849

a(n) = ∑_{k=0..floor(n/2)} binomial(k+1,2·n-4·k+1). A392489

Triangle read by rows: T(n,k) is the number of Schroeder paths of length 2n and having k up steps starting at an odd height. A101920