Properties of the Number 15229

Fifteen Thousand Two Hundred Twenty-Nine

Basics

Value: 15228 → 15229 → 15230

Parity: odd

Prime: No

Previous Prime: 15227

Next Prime: 15233

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 97 × 157

Divisors: 1, 97, 157, 15229

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11101101111101

Octal: 35575

Duodecimal: 8991

Hexadecimal: 3b7d

Square: 231922441

Square Root: 123.40583454602137

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

Golden semiprimes: a(n)=p·q and abs(p*φ-q)<1, where φ = golden ratio = (1+sqrt(5))/2. A108540

Number of non-isomorphic set-systems of weight n in which all parts have the same size. A306019

Bases b where exactly seven primes p with p < b exist such that p is a base-b Wieferich prime. A325883

Expansion of (5-4·x-12·x²+6·x³+3·x⁴)/(1-x-4·x²+3·x³+3·x⁴-x⁵). A189234

Numbers m such that Stern polynomial B(m,x) has no irreducible polynomial factors that themselves are Stern polynomials. The initial a(1) = 1 is included by convention. A389918

Successively better golden semiprimes. A165570

The Euclid tree with root 1 encoded by semiprimes, read across levels. A295512

a(n) = a(n-1)+ a(round(2*(n-1)/3)) +a(round((n-1)/3)) starting a(1)=1. A33498

An accelerator sequence for Catalan's constant. A94650

E.g.f.: BesselJ(0,2)*P(x) + Q(x), where P(x) = 1/∏_n>=1 (1 - xⁿ/n²) and Q(x) = ∑_n>=1 -(-1)ⁿ/∏_k=1..n (k² - x^k). A249607