Properties of the Number 81223

Eighty-One Thousand Two Hundred Twenty-Three

Basics

Value: 81222 → 81223 → 81224

Parity: odd

Prime: Yes

Previous Prime: 81203

Next Prime: 81233

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 81223

Divisors: 1, 81223

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110101000111

Octal: 236507

Duodecimal: 3B007

Hexadecimal: 13d47

Square: 6597175729

Square Root: 284.9964912064708

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

Numbers k such that (3^k + 4^k)/7 is prime. A128066

Primes p such that p+2 is the square of a product of 3 distinct primes. A164519

a(1)= 3, a(n) = least prime obtained by prefixing the digits of a multiple of n to a(n-1). A88056

Primes of the form 9n² - 2. A201860

Number of Carlitz compositions of n with parts in standard order. A383751

Smallest k such that floor(k*γ) begins with n (γ=0.5772156649...). A81223

Number of base 4 n-digit numbers with digit sum n. A71646

Number of n-step tri-directional self-avoiding walks on the hexagonal lattice, after first step. A272480