Properties of the Number 6631

Six Thousand Six Hundred Thirty-One

Basics

Value: 6630 → 6631 → 6632

Parity: odd

Prime: No

Previous Prime: 6619

Next Prime: 6637

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 19 × 349

Divisors: 1, 19, 349, 6631

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1100111100111

Octal: 14747

Duodecimal: 3A07

Hexadecimal: 19e7

Square: 43970161

Square Root: 81.43095234614415

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

Irregular triangle read by rows where T(n,k) is the number of integer compositions of n with k weak excedances (parts on or above the diagonal), all zeros removed. A352525

Second 11-gonal (or hendecagonal) numbers: a(n) = n*(9·n+7)/2. A62728

a(1) = 2; a(n) is smallest number >= a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime. A33679

Number of integer compositions of n that have only one part or whose consecutive parts are coprime and the last and first part are also coprime. A318748

Number of partitions of n having no parts with multiplicity 4. A184639

T(n,k)=Number of nXk 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than two of its immediate leftward or upward or left-upward diagonal neighbors. A208269

Numbers that are the sum of nine fifth powers in two or more ways. A345619

Numbers that are the sum of nine fifth powers in exactly two ways. A346337

Numbers congruent to 3 in the structure (or curve) of A211000. A211002

a(1) = 2, and for n>1: a(n) = prime(A251719(n)) * prime(A251719(n) + n - 2), where prime(n) gives the n-th prime. A251724