53 is the only Prime number out of the four numbers because it has only two factors.
53 is the prime number.
If you mean: 53 81 41 47 and 31 then 81 is a composite number while all the rest are prime numbers
81 is not prime it's a composite number
To calculate it you add 81 and 57, then divide by 2.
81 is not a prime number. 81 = 3 * 3 * 3 * 3
No.
Lanthanum has 57 protons and 81-82 neutrons.
find the prime factorization to the number 81
81 is an odd composite number.
81 is not a prime number. Its positive integer factors are: 1, 3, 9, 27, 81.81 is a Composite Number.
The prime factorization of 81 is 3x3x3x3 or 34 in exponential form.
83