Properties of the Number 31481

Thirty-One Thousand Four Hundred Eighty-One

Basics

Value: 31480 → 31481 → 31482

Parity: odd

Prime: Yes

Previous Prime: 31477

Next Prime: 31489

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 31481

Divisors: 1, 31481

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111101011111001

Octal: 75371

Duodecimal: 16275

Hexadecimal: 7af9

Square: 991053361

Square Root: 177.4288589829738

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 2n²+14n+5. A154577

n such that A205592(n) > n. A205594

a(n) = smallest Ramanujan prime R_k in A104272 that is >= A000101(n). A214757

Larger of emirp pairs whose digital sums are also emirps (A178091). A178093

Consecutive states of the linear congruential pseudo-random number generator (31481·s+21139) mod 10⁵ when started at s=1. A384341

Third prime p such that (p+n)²+n is prime but (p+j)²+j is not prime for all 0<j<n. A238675

Primes p such that (p²+2)/3 and (p⁴+2)/3 are prime. A256811

Numbers n such that the sum of the digits of the n-th Fibonacci number written in bases 2, 3, 5 and 7 is prime. A111064

Numbers k such that k, prime(k) and primepi(reverse(prime(k))) are emirps (A006567). A382389

Numbers whose base-6 representation has 2 fewer 0's than 5's. A31481