Properties of the Number 20211

Twenty Thousand Two Hundred Eleven

Basics

Value: 20210 → 20211 → 20212

Parity: odd

Prime: No

Previous Prime: 20201

Next Prime: 20219

Digit Sum: 6

Digital Root: 6

Palindrome: No

Factorization: 3 × 6737

Divisors: 1, 3, 6737, 20211

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111011110011

Octal: 47363

Duodecimal: B843

Hexadecimal: 4ef3

Square: 408484521

Square Root: 142.16539663363938

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

Self-convolution cube-root of A106216, which consists entirely of digits {0,1,2} after the initial terms {1,3}. A106219

Numbers of the form HMMSS with primes H < 24 and MM, SS < 60, for which the number of seconds after midnight, 3600·H+60·MM+SS, is also prime. A295011

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

a(0) = 16, after which, if (2·a(n-1)) - 1 = ∏_{k >= 1} (p_k)^c_k then a(n) = ∏_{k >= 1} (p_k-1)^c_k, where p_k indicates the k-th prime, A000040(k). A246345

Rounded volume of a regular octahedron with edge length n. A71400

Numbers with decimal expansion d₁, ..., d_w such that for any k in 1..w there is some m in 1..w such that d_k = d_m = abs(k - m). A336880

Nonnegative integers k such that the Chebyshev distance between the vector of proportions of the digits 0-9 in 2^k and the uniform distribution (1/10, ..., 1/10) sets a new minimum. A393333

Self-slideable numbers: numbers which can reproduce themselves by sliding each digit d by d places either to the left or to the right. A295010

Number of 0..n arrays x(0..4) of 5 elements with zero 4th difference. A200156

Numbers n such that A002496(n) mod A002496(n-1) is a perfect square. A247592