Properties of the Number 20217

Twenty Thousand Two Hundred Seventeen

Basics

Value: 20216 → 20217 → 20218

Parity: odd

Prime: No

Previous Prime: 20201

Next Prime: 20219

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 23 × 293

Divisors: 1, 3, 23, 69, 293, 879, 6739, 20217

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111011111001

Octal: 47371

Duodecimal: B849

Hexadecimal: 4ef9

Square: 408727089

Square Root: 142.18649724921138

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) = 14·n² + 1. A158482

Prime time numbers on 6-digit clocks: numbers of the form HMMSS where H, MM, SS are primes, H < 24, MM and SS < 60. A295014

Total number of left-to-right maxima in all compositions of n into distinct parts. A336718

Write down the numbers from 3 to infinity. Take next number, M say, that has not been crossed off. Counting through the numbers that have not yet been crossed off after that M, cross off every 5th term. Repeat, always crossing off every 5th term of those that remain. The numbers that are left form the sequence. A100586

a(n) = A335175(n) + A335176(n). A335177

Number of partitions of the (n+4)-multiset {0,...,0,1,2,3,4} with n 0's. A346857

Expansion of (2-4·x+x³)/((1-x)*(1-2·x-x²+x³)). A52949

Diagonal sums of number array A082110. A82114

a(n) = 56·n² + 1. A158660

Maximum fixed points under iteration of sum of cubes of digits in base n. A226026