Properties of the Number 30081

Thirty Thousand Eighty-One

Basics

Value: 30080 → 30081 → 30082

Parity: odd

Prime: No

Previous Prime: 30071

Next Prime: 30089

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 37 × 271

Divisors: 1, 3, 37, 111, 271, 813, 10027, 30081

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111010110000001

Octal: 72601

Duodecimal: 154A9

Hexadecimal: 7581

Square: 904866561

Square Root: 173.43874999549553

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 strongly unimodal partitions of n (strongly unimodal means strictly increasing then strictly decreasing). A59618

"Sloping binary representation" of powers of 3 (A000244), slope = -1. A37095

Divisors of 10¹⁵ - 1. A111117

Nonnegative values·of solutions (x, y) to the Diophantine equation x² + (x+479)² = y². A207075

G.f. A(x) satisfies A(x) = (1 + x / (1 - x·A(x))²)³. A365121

Fixed points of permutations A263265 and A263266. A263281

Decimal part of cube root of a(n) starts with 1: first term of runs. A34127

Triangle T(n,m) = 2+A176697(n)-A176697(m)-A176697(n-m) read along rows 0<=m<=n. A176700

Numbers k such that k⁷*2^k + 1 is a prime. A367560

Number of ordered 5-tuples of integers from [ 1,n ] with no common factors among triples. A15656