Primes / Is 55 prime?

Is 55 a Prime Number?

No55 = 5 x 11

55 is NOT prime: 5 × 11 = 55. That makes 5 a genuine divisor of 55 beyond 1 and 55 itself. Fully broken down, 55 = 5 × 11, for 4 divisors total. 55 sits between primes 53 and 59, 2 below and 4 above. 55: 5, 11 divide 55 evenly, checked against 2-12. 55 is odd, digit sum 10 for 55, digital root 1 for 55. 55 has 4 primes within 10 of 55.