Properties of the Number 51669

Fifty-One Thousand Six Hundred Sixty-Nine

Basics

Value: 51668 → 51669 → 51670

Parity: odd

Prime: No

Previous Prime: 51659

Next Prime: 51673

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5741

Divisors: 1, 3, 9, 5741, 17223, 51669

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1100100111010101

Octal: 144725

Duodecimal: 25A99

Hexadecimal: c9d5

Square: 2669685561

Square Root: 227.3081608741754

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

Odd composites k such that σ(k) has the same powerful part as k, where σ is the sum of divisors function. A386425

Number of permutations of [n] whose non-fixed points are not neighbors. A372102

a(n) = n⁵-n⁴-n³-n²-n. A152017

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, -1), (0, 0, -1), (0, 1, 1), (1, 0, 0)}. A150005

a(n) = 11·2ⁿ - 4·n - 10. A51669

Number of (n+1)X(3+1) 0..2 arrays with the maximum plus the upper median of every 2X2 subblock equal. A236897