Properties of the Number 18211

Eighteen Thousand Two Hundred Eleven

Basics

Value: 18210 → 18211 → 18212

Parity: odd

Prime: Yes

Previous Prime: 18199

Next Prime: 18217

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 18211

Divisors: 1, 18211

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011100100011

Octal: 43443

Duodecimal: A657

Hexadecimal: 4723

Square: 331640521

Square Root: 134.94813818648998

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

First term of balanced prime quartets: p(m+1)-p(m) = p(m+2)-p(m+1) = p(m+3)-p(m+2). A54800

Initial prime in set of 4 consecutive primes with common difference 6. A33451

Primes which yield a prime whenever a 1 is inserted anywhere in them (including at the beginning or end). A69246

Primes p such that p, p+6, p+12, p+18 are all primes. A23271

Discriminants of imaginary quadratic fields with class number 25 (negated). A56987

Primes p such that p, p+6, p+12, p+18 are consecutive primes and p = 6·k+1 for some k. A90837

Primes of the form 2·n² + 82·n + 39. A217620

Primes having only {1, 2, 8} as digits. A385775

Primes p such that the differences between the 5 consecutive primes starting with p are (6,6,6,4). A78969

Triangular array: T(n,k) = T(n,n) = 1, T(n,k) = 5·T(n-1, k-1) + 2·T(n-1, k), read by rows. A119727