Properties of the Number 30855

Thirty Thousand Eight Hundred Fifty-Five

Basics

Value: 30854 → 30855 → 30856

Parity: odd

Prime: No

Previous Prime: 30853

Next Prime: 30859

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 11 ² × 17

Divisors: 1, 3, 5, 11, 15, 17, 33, 51, 55, 85

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111100010000111

Octal: 74207

Duodecimal: 15A33

Hexadecimal: 7887

Square: 952031025

Square Root: 175.65591364938444

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

Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(0) + b(1) + ... + b(n-1), where a(0) = 1, a(1) = 2, b(0) = 3, and (a(n)) and (b(n)) are increasing complementary sequences. A295053

Irregular triangle read by rows where T(n,k) is the number of integer compositions of n with k excedances (parts above the diagonal), all zeros removed. A352524

Number of integer compositions of n with exactly one part above the diagonal. A351983

Numbers k such that k and k+1 are both φ-practical numbers (A260653). A330871

Smallest k for which a chain of linked rods of length 1, ..., k can be folded in half in exactly n dictinct ways. A390056

Number of labeled 3-connected planar graphs with n edges. A343871

Consider iteration of the function f(x) = σ(φ(x)) = A062402(x). Sequence lists the numbers k such that the trajectory of k returns to k. A96998

Numbers k such that A070313(k) = 2^k - (2·k+1) is a prime number. A344781

[ exp(11/20)*n! ]. A30855