Properties of the Number 18223

Eighteen Thousand Two Hundred Twenty-Three

Basics

Value: 18222 → 18223 → 18224

Parity: odd

Prime: Yes

Previous Prime: 18217

Next Prime: 18229

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 18223

Divisors: 1, 18223

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100011100101111

Octal: 43457

Duodecimal: A667

Hexadecimal: 472f

Square: 332077729

Square Root: 134.9925923893604

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 of the form k² - 2. A28871

Balanced primes of order four. A82079

Number T(n,k) of set partitions of [n] where k is minimal such that for each block b the smallest integer interval containing b has at most k elements; triangle T(n,k), n>=0, 0<=k<=n, read by rows. A276727

Primes p for which exactly five bases b with 1 < b < p exist such that p is a base b Wieferich prime. A255208

Third member of a sexy prime quadruple: value of p+12 such that p, p+6, p+12 and p+18 are all prime. A46123

Number of n-length words w over a 5-ary alphabet {a1,a2,...,a5} such that #(w,a1) >= #(w,a2) >= ... >= #(w,a5) >= 0, where #(w,x) counts the letters·in word w. A226875

Sums of groups in A075635. A75636

Primes that are 2 less than a perfect power m^k, k >= 2. A94786

Records in A117677. A117679

a(n) = 2·n³ - 313·n² + 6823·n - 13633. A218456