Properties of the Number 80519

Eighty Thousand Five Hundred Nineteen

Basics

Value: 80518 → 80519 → 80520

Parity: odd

Prime: No

Previous Prime: 80513

Next Prime: 80527

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 73 × 1103

Divisors: 1, 73, 1103, 80519

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011101010000111

Octal: 235207

Duodecimal: 3A71B

Hexadecimal: 13a87

Square: 6483309361

Square Root: 283.75870030714475

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 k such that 4^k == 2 (mod k). A130421

T(n,k)=Number of nXk 0..4 arrays with each element·equal to the number of its horizontal and vertical neighbors equal to 3,3,0,1,2 for x=0,1,2,3,4. A198013

Numbers k such that 2^2·k-1 == 1 (mod k). A347906

Least k >= 2 with n^kn == n (mod kn), also n^kn-1 == 1 (mod k). A102457

a(n) = A102457(k) for k in A102458. For these k, A102457(k) ≠ lpf(k-1). A102459

Number of nX5 0..4 arrays with each element·equal to the number its horizontal and vertical neighbors equal to 3,3,0,1,2 for x=0,1,2,3,4. A198010

Number of (n+3) X 4 0..2 matrices with each 4 X 4 subblock idempotent. A224721

Number of n X n 0..4 arrays with each element·equal to the number of its horizontal and vertical neighbors equal to 3,3,0,1,2 for x=0,1,2,3,4. A198007

a(n) is the smallest composite k such that k divides 2^k·n-1 - 1. A317556

T(n,k)=Number of (n+3)X(k+3) 0..2 matrices with each 4X4 subblock idempotent. A224728