Primes / Is 53 prime?

Is 53 a Prime Number?

Yes

53 is prime: for 53, testing every prime up to √53 ≈ 7.3 (namely 2, 3, 5, 7) finds no divisor. 53 sits between primes 47 and 59, 6 below and 6 above. 53 shares no factor with 2-12; 53's divisors start beyond that range. 53 is odd, digit sum 8 for 53, digital root 8 for 53. 53 has 5 primes within 10 of 53.