Properties of the Number 23155

Twenty-Three Thousand One Hundred Fifty-Five

Basics

Value: 23154 → 23155 → 23156

Parity: odd

Prime: No

Previous Prime: 23143

Next Prime: 23159

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 5 × 11 × 421

Divisors: 1, 5, 11, 55, 421, 2105, 4631, 23155

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101101001110011

Octal: 55163

Duodecimal: 11497

Hexadecimal: 5a73

Square: 536154025

Square Root: 152.16767067941862

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

a(n) = ∑_m=1..n ∑_k=1..m prime(k). A14148

Expansion of exp( ∑_n>=1 -sigma₃(n)*xⁿ/n ) in powers of x. A283263

Result of using the perfect squares as coefficients in an infinite polynomial series in·and then expressing this series as (1+a(1)x)(1+a(2)x²)(1+a(3)x³)... A147559

Constant term of the reduction by x²->x+1 of the polynomial p(n,x) defined at Comments. A193046

Expansion of ∑_i>=0 x^2ⁱ/(1 - x^2ⁱ) / ∏_j>=0 (1 - x^{2^j}). A281688

Expansion of e.g.f. exp( -(exp(x) - 1)³ / 6 ). A354396

Trajectory of 8 under iteration of the map k -> A087712(k). A144813

Pseudoprimes to base 21. A20149

Number of subwords UHH...HD in all peakless Motzkin paths of length n+3, where U=(1,1), D=(1,-1) and H=(1,0). A89742

a(n) = [xⁿ] ((x - 1)*(x + 1)*(2·x² - 1))/(2·x⁴ + 4·x³ - x² - 3·x + 1). A327993