Properties of the Number 30881

Thirty Thousand Eight Hundred Eighty-One

Basics

Value: 30880 → 30881 → 30882

Parity: odd

Prime: Yes

Previous Prime: 30871

Next Prime: 30893

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 30881

Divisors: 1, 30881

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111100010100001

Octal: 74241

Duodecimal: 15A55

Hexadecimal: 78a1

Square: 953636161

Square Root: 175.72990639046048

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 form n² + 256. A256776

Reflectable emirps. A7628

Numerator of ∑_k=1..n d(k)/k, where d() = A000005(). A60436

Primes of the form (5+ a triangular number A000217). A159049

Primes that are the sum of 51 consecutive primes. A215992

Third term of weak prime sextet: p(m-1)-p(m-2) < p(m)-p(m-1) < p(m+1)-p(m) < p(m+2)-p(m+1) < p(m+3)-p(m+2). A54830

Primes p such that p*(p-1) divides 3^p-1-1. A81763

Smallest primes p = p(k) with (p(k)+p(k+1)+p(k+2))/15 an integer. A168556

Primes p such that 2·p⁴+-9 are also prime. A174365

Numbers p such that p = (prime(n)+ prime(n+3))/2 is prime for prime indices n=2, 3, 5... A98039