Properties of the Number 75221

Seventy-Five Thousand Two Hundred Twenty-One

Basics

Value: 75220 → 75221 → 75222

Parity: odd

Prime: No

Previous Prime: 75217

Next Prime: 75223

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 19 × 37 × 107

Divisors: 1, 19, 37, 107, 703, 2033, 3959, 75221

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10010010111010101

Octal: 222725

Duodecimal: 37645

Hexadecimal: 125d5

Square: 5658198841

Square Root: 274.2644709035423

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) is the largest anagram of 2·a(n-1), a(1)=1. A263451

T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 horizontally and 0 0 1 vertically. A207088

Number of integer partitions of n that are neither Look-and-Say nor section-sum. A383510

Number of n X 4 0..1 arrays avoiding 0 0 0 horizontally and 0 0 1 vertically. A207084

Number of 5Xn 0..1 arrays avoiding 0 0 0 horizontally and 0 0 1 vertically. A207091

Nonprimes n such that the sum of proper divisors of n and the product of proper divisors of n are both perfect cubes. A244429

Number of nX6 0..1 arrays with every element unequal to 0, 1, 3, 4, 6 or 8 king-move adjacent elements, with upper left element zero. A316309

Number of polyiamonds with n cells that tile the plane by translation or by 180-degree rotation (Conway criterion). A75221

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 3, 4, 6 or 8 king-move adjacent elements, with upper left element zero. A316311