Properties of the Number 7550

Seven Thousand Five Hundred Fifty

Basics

Value: 7549 → 7550 → 7551

Parity: even

Prime: No

Previous Prime: 7549

Next Prime: 7559

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 × 5 ² × 151

Divisors: 1, 2, 5, 10, 25, 50, 151, 302, 755, 1510

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 1110101111110

Octal: 16576

Duodecimal: 4452

Hexadecimal: 1d7e

Square: 57002500

Square Root: 86.89073598491383

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

Twice second pentagonal numbers. A49451

Numbers n such that the decimal expansions of both n and n² have 0 as smallest digit and 7 as largest digit. A256634

Number of compositions of n avoiding the pattern (1,2,1). A335471

Triangle T, read by rows, where the g.f. of row n of Tⁿ = (n² + y)ⁿ for 0 <= n <= 29, where Tⁿ denotes the n-th power of T considered as (lower-left) matrix. A132870

T(n,k)=Number of nXnXn triangular 0..k arrays with every horizontal row nondecreasing and having the same average value. A214906

a(1) = 393; for n > 1, a(n) = a(n-1) + 1 + sum of distinct prime factors of a(n-1) that are < a(n-1). edit. A105210

Expansion of ∏_k>=1 (1 - x^k/(1 - x)). A307599

Expansion of g.f. (1-x+x²)/(1+x-x³). A104771

Numbers n such that A117731(n) differs from A082687(n). A125740

Column 2 of triangle A132870 (first 30 terms only). A132874