Properties of the Number -7223

Two Hundred Twenty-Three

Basics

Value: -7224 → -7223 → -7222

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 31 × 233

Divisors: 1, 31, 233, 7223

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: -1110000110111

Octal: -16067

Duodecimal: -421B

Hexadecimal: -1c37

Square: 52171729

Square Root: 84.98823447983844

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

a(n) = 4·n² + 4·n - 1. A73577

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 4 6 or 7. A252457

Least nontrivial multiple of the n-th prime beginning with 7. A78291

Representation as a sum of squares requires n squares with greedy algorithm. A6892

Numbers that are the sum of seven fifth powers in two or more ways. A345605

Numbers that are the sum of seven fifth powers in exactly two ways. A346279

Triangle read by rows: T(n,g) = number of general immersions of a circle with n crossings in a surface of arbitrary genus g (the circle is oriented, the surface is unoriented). A260885

a(n) = sqrt(A137880(n)). A137881

Denominator of (prime(n)+1)*(prime(n+1)+1)/(4*(prime(n)*prime(n+1)+1)). A79082

a(1) = 1; for n > 1: a(n) = smallest odd number greater than a(n-1) which does not use any digit used by a(n-1). A229364