Is 240956021 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 240 956 021 is a prime number.
Indeed, the definition of a prime numbers is to have exactly two distinct positive divisors, 1 and itself. A number is a divisor of another number when the remainder of Euclid’s division of the second one by the first one is zero. Concerning the number 240 956 021, the only two divisors are 1 and 240 956 021. Therefore 240 956 021 is a prime number.
As a consequence, 240 956 021 is only a multiple of 1 and 240 956 021.
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Since 240956021 is a prime number, 240956021 is also a deficient number, that is to say 240956021 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 240956021 without 240956021 itself (that is 1, by definition!).