Properties of the Number 55154

Fifty-Five Thousand One Hundred Fifty-Four

Basics

Value: 55153 → 55154 → 55155

Parity: even

Prime: No

Previous Prime: 55147

Next Prime: 55163

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 11 × 23 × 109

Divisors: 1, 2, 11, 22, 23, 46, 109, 218, 253, 506

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1101011101110010

Octal: 153562

Duodecimal: 27B02

Hexadecimal: d772

Square: 3041963716

Square Root: 234.8488875851874

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

Numbers k such that σ(k) = 4*φ(k). A68390

4-dimensional figurate numbers: a(n) = (5·n-1)*binomial(n+2,3)/4. A2418

a(n) = ∑_k=1..n-1 k*σ(k)*σ(n-k). A441

Integers n such that σ(n)/φ(n) is a perfect square. A293391

Numbers n such that the arithmetic, geometric and harmonic means of φ(n) and σ(n) are all integers. A65146

a(n) = n*(n+1)*(n+2)*(n²+2·n+17)/120. A257199

Numbers k such that σ(k) = φ(k)*ω(k). A73567

Group the natural numbers such that the n-th group sum is divisible by prime(n): (1, 2, 3), (4, 5), (6, 7, 8, 9), (10, 11), (12, 13, 14, 15, 16, 17, 18, 19, 20, 21), ... Sequence contains the sum of the terms in the n-th group. A86491

a(n) = 384·4ⁿ - 576·3ⁿ + 220·2ⁿ - 14. A305862

Numbers k such that usigma(k) = φ(k)*ω(k), where ω(k) is the number of distinct prime divisors of k. A63795