Properties of the Number 64381

Sixty-Four Thousand Three Hundred Eighty-One

Basics

Value: 64380 → 64381 → 64382

Parity: odd

Prime: Yes

Previous Prime: 64373

Next Prime: 64399

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 64381

Divisors: 1, 64381

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111101101111101

Octal: 175575

Duodecimal: 31311

Hexadecimal: fb7d

Square: 4144913161

Square Root: 253.73411280314676

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

Primes p2 such that p1³ + p2² is an average of twin primes and p1 < p2 are consecutive primes. A138755

Numbers n such that the numbers of divisors of n,n+1,n+2 and n+3 are k,2k,4k,8k respectively for some k. A100364

Value of prime number D for incrementally largest values of minimal·satisfying the equation x² - D·y² = 3. A336794

Value of prime number D for incrementally largest values of minimal y satisfying the equation x² - D·y² = 3. A336796

Sequence (a(n): n >= 1) that shifts left 2 places under the "CIK" (necklace, indistinct, unlabeled) transform and satisfies a(1) = a(2) = 1. A32202

Number of (n+2)X(2+2) 0..4 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order. A252955

Number of subsets of {2,...,n} such that the product of their elements is congruent to 0 (mod n+1). A64381