Properties of the Number 61831

Sixty-One Thousand Eight Hundred Thirty-One

Basics

Value: 61830 → 61831 → 61832

Parity: odd

Prime: No

Previous Prime: 61819

Next Prime: 61837

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 7 × 11 ² × 73

Divisors: 1, 7, 11, 73, 77, 121, 511, 803, 847, 5621

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111000110000111

Octal: 170607

Duodecimal: 2B947

Hexadecimal: f187

Square: 3823072561

Square Root: 248.65840022006094

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) = σ(n⁴). A202994

Pseudoprimes to base 9 that are not squarefree. A306448

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 73 ones. A31841

a(n) = (2^2·n+1 - 1)*(3ⁿ⁺¹ - 1)/2. A269255

Odd bi-unitary abundant numbers: odd numbers k such that bsigma(k) > 2·k, where bsigma is the sum of the bi-unitary divisors function (A188999). A293186

Multiples of 9 having only even digits. A61831

Numbers k such that k = σ(s(s(s(k)))) where s(k) = σ(k)-k and σ = A000203. A387218