Properties of the Number 80656

Eighty Thousand Six Hundred Fifty-Six

Basics

Value: 80655 → 80656 → 80657

Parity: even

Prime: No

Previous Prime: 80651

Next Prime: 80657

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ⁴ × 71 ²

Divisors: 1, 2, 4, 8, 16, 71, 142, 284, 568, 1136

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10011101100010000

Octal: 235420

Duodecimal: 3A814

Hexadecimal: 13b10

Square: 6505390336

Square Root: 284

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

Squares whose arithmetic mean of digits is an integer (i.e., the sum of digits is a multiple of the number of digits). A69711

a(n) = (11·n + 9)². A17498

Squares with initial digit '8'. A45792

Determinant of the n X n matrix with (i,j)-entry equal to 1 or 0 according as i + j and 4*(i + j)² + 1 are both prime or not. A228561

Squares present in A276573 (the infinite trunk of least squares beanstalk). A277016

Squares whose decimal representation contains no proper subsequence which is a positive square. A130448

Square numbers not of form m + sum of digits of m. A171671

Numbers n (other than powers of 2) such that abs(abundance(n)) is an odd square. A188484

Squares k such that k + π(k) is a prime. A73946

Squares in whose primorial base expansion only even digits appear. A328850