Properties of the Number 81611

Eighty-One Thousand Six Hundred Eleven

Basics

Value: 81610 → 81611 → 81612

Parity: odd

Prime: Yes

Previous Prime: 81569

Next Prime: 81619

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 81611

Divisors: 1, 81611

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111011001011

Octal: 237313

Duodecimal: 3B28B

Hexadecimal: 13ecb

Square: 6660355321

Square Root: 285.6763903440395

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

Number of rectangular plane partitions of n. A323429

Primes having only {1, 6, 8} as digits. A385782

a(n) is the smallest prime number whose a056240-type is n (see Comments). A293652

Primes of the form 2·k² + 3. A201473

Indices of records in A243145. A299073

Primes of the form 8n² + 3. A201611

Prime intersections in a square spiral with positive integers: primes p such that there are four primes among eight nearest neighbors of p. A215470

Integers in Ulam's spiral for which the numbers around them form a square whose four corners are all prime numbers. A383596

a(n) is the smallest composite number whose prime divisors (with multiplicity) sum to prime(n); n >= 3. A295185

Number of numbers <= n having no 2 in their ternary representation. A81611