Properties of the Number 80520

Eighty Thousand Five Hundred Twenty

Basics

Value: 80519 → 80520 → 80521

Parity: even

Prime: No

Previous Prime: 80513

Next Prime: 80527

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 ³ × 3 × 5 × 11 × 61

Divisors: 1, 2, 3, 4, 5, 6, 8, 10, 11, 12

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10011101010001000

Octal: 235210

Duodecimal: 3A720

Hexadecimal: 13a88

Square: 6483470400

Square Root: 283.7604623621832

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

Distribution of maximum inversion table entry. A56151

Third elementary symmetric function of 3,4,...,n+4. A24184

Positive integers that are square roots of products a*(a+d)*(a+2·d) with coprime a > 0, d >= 0. A284876

a(n) = (prime(n)⁵ - prime(n))/2. A138424

Number of nonempty subsets of {1,2,...,n} in which exactly 3/5 of the elements are <= n/2. A47167

Define an array by d(m, 0) = 1, d(m, 1) = m; d(m, k) = (m - k + 1) d(m+1, k-1) - (k-1) (m+1) d(m+2, k-2). Sequence gives d(n,4). A126958

a(n) = n*(n⁴-1)/2. A27484

Number of nonempty subsets of {1,2,...,n} in which exactly 3/5 of the elements are <= (n-1)/2. A47178

Positions of the letter e (or è) in the French phrase enumerating these positions, "E est la première, deuxième, neuvième, douzième, quatorzième, seizième, ... lettre dans cette phrase, où les espaces, les virgules et les traits d'union ne comptent pas.". A80520