Properties of the Number 43661

Forty-Three Thousand Six Hundred Sixty-One

Basics

Value: 43660 → 43661 → 43662

Parity: odd

Prime: Yes

Previous Prime: 43651

Next Prime: 43669

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 43661

Divisors: 1, 43661

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010101010001101

Octal: 125215

Duodecimal: 21325

Hexadecimal: aa8d

Square: 1906282921

Square Root: 208.95214763193988

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

Primes of the form x² + 7·y², where·and y=x+1 are consecutive natural numbers. A176616

Primes equal to a hexagonal number plus 1. A285790

Primes equal to a centered 9-gonal number plus 1. A285812

Number of 2 X 2 matrices having all terms in {1,...,n} and determinant >= n. A211061

Number of forests of rooted plane binary trees (all nodes have outdegree of 0 or 2) with n total nodes. A222006

a(n) = (2²⁺ⁿ-(-1)ⁿ)/3 - 2·n. A141025

Primes such that prime plus its digit sum is a perfect square. A230087

Number of (n+1) X (5+1) 0..1 arrays with every 2 X 2 subblock antidiagonal maximum minus diagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal minimum nondecreasing vertically. A253394

a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (natural numbers), t = (F(2), F(3), F(4), ... ). A24861

Number of active (ON, black) cells at stage 2ⁿ-1 of the two-dimensional cellular automaton defined by "Rule 529", based on the 5-celled von Neumann neighborhood. A272747