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Properties of the Number 91215

Ninety-One Thousand Two Hundred Fifteen

Basics

Value: 91214 → 91215 → 91216

Parity: odd

Prime: No

Previous Prime: 91199

Next Prime: 91229

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 2 × 5 × 2027

Divisors: 1, 3, 5, 9, 15, 45, 2027, 6081, 10135, 18243

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: 10110010001001111

Octal: 262117

Duodecimal: 44953

Hexadecimal: 1644f

Square: 8320176225

Square Root: 302.01821137143367

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

Numbers n such that 7·10n + 3 is prime. A97970
Numbers decremented by their digit product produce a cube. A229184
Number of n X n binary arrays with all ones connected only in a 1100-1111-0100 pattern in any orientation. A146706
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1111-0100 pattern in any orientation. A146708
Number of walks within N3 (the first octant of Z3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (0, 0, 1), (0, 1, 0), (1, 0, 1), (1, 1, -1)}. A151130
A014580-indices of irreducible GF(2)[X]-polynomials that are composite integers. A91215
Number of 6-element families of an n-element set such that every 3 members of the family have a nonempty intersection. A51363
Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 4 6 or 7. A252553
Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 5 6 or 7. A252569