Properties of the Number 55487

Fifty-Five Thousand Four Hundred Eighty-Seven

Basics

Value: 55486 → 55487 → 55488

Parity: odd

Prime: Yes

Previous Prime: 55469

Next Prime: 55501

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 55487

Divisors: 1, 55487

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1101100010111111

Octal: 154277

Duodecimal: 2813B

Hexadecimal: d8bf

Square: 3078807169

Square Root: 235.55678720852006

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

Primes of the form 3·m² - 1. A89682

Primes that remain prime through 4 iterations of function f(x) = 2x + 3. A23303

Primes p such that the decimal expansion of p remains prime under two iterations of base-10 to base-2 conversions. A123266

Primes of the form 12·n²-1. A143830

a(n) = 48·n² - 1. A65532

Primes p such that if q and r are the next two primes, (p - 1)² + 1, (q - 1)² + 1 and (r - 1)² + 1 are all prime. A376605

Lexicographically earliest infinite sequence of distinct primes such that, for n > 0, 2n | (a(n+1) - a(n)) and, for n > 0, b(n+1) > b(n) where b(n) = (a(n+1) - a(n)) / 2n. A350392

Least m such that φ(m) = n!. A55487

Consider the set P of pairs (a,b) generated by the rules: (1,1) is in P; if (a,b) is in P then (b,a+b) is in P; if (a,b) and (a',b') are in P then (aa', bb') is in P. Sequence gives numbers not appearing in P. A53403

Rectangular array A read by upward antidiagonals in which the entry in row n and column k is defined by A(n,k) = prime(2^n-1*(2·k-1)), n,k >= 1. A264731