Properties of the Number 80825

Eighty Thousand Eight Hundred Twenty-Five

Basics

Value: 80824 → 80825 → 80826

Parity: odd

Prime: No

Previous Prime: 80819

Next Prime: 80831

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 ² × 53 × 61

Divisors: 1, 5, 25, 53, 61, 265, 305, 1325, 1525, 3233

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10011101110111001

Octal: 235671

Duodecimal: 3A935

Hexadecimal: 13bb9

Square: 6532680625

Square Root: 284.29737951659

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) = sum of squares of first n positive integers congruent to 1 mod 4. A24381

Number of nX7 0..1 arrays with no element unequal to a strict majority of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. A280232

T(n,k)=Number of nXk 0..1 arrays with no element unequal to a strict majority of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. A280233

Triangle read by rows in which n-th row gives trajectory of n (omitting n itself) under the map k -> k-1 if k odd, k -> k/2 if k even. A80825