Properties of the Number 2631

Two Thousand Six Hundred Thirty-One

Basics

Value: 2630 → 2631 → 2632

Parity: odd

Prime: No

Previous Prime: 2621

Next Prime: 2633

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 877

Divisors: 1, 3, 877, 2631

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 101001000111

Octal: 5107

Duodecimal: 1633

Hexadecimal: a47

Square: 6922161

Square Root: 51.29327441292864

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

Tetranacci numbers with different initial conditions: a(n) = a(n-1) + a(n-2) + a(n-3) + a(n-4) starting with a(0)=4, a(1)=1, a(2)=3, a(3)=7. A73817

Expansion of q * (f(q⁹) / f(q))³ in powers of q where f() is a Ramanujan θ function. A227454

Tetranacci numbers A073817 without the leading term 4. A1648

Number of winning length n strings with a 3-symbol alphabet in "same game". A35617

Numbers k such that lcm(1,2,3,...,k)/5 equals the denominator of the k-th harmonic number H(k). A112814

Positions of 5's on the spiral defined in A308890. A308895

Square array T(b,m), read by descending antidiagonals: Number of winning length m strings with a b-symbol alphabet in "same game" (b >= 2, m >= 0). A323844

Positive numbers whose product of digits is three times their sum. A62035

Number A(n,k) of n-length words w over a k-ary alphabet {a₁,...,a_k} such that w contains never more than j consecutive letters a_j (for 1<=j<=k); square array A(n,k), n>=0, k>=0, read by antidiagonals. A242464

Numbers for which the sum of reciprocals of digits is an integer. A34708