Write $5.251 \times 10^{6}$ in decimal form.

Step 1 ：The question is asking to convert a number from scientific notation to decimal form. In scientific notation, the number \(a \times 10^{b}\) represents the number \(a\) moved \(b\) places to the right (if \(b\) is positive) or to the left (if \(b\) is negative). In this case, we have \(5.251 \times 10^{6}\), which means we need to move the decimal point in \(5.251\) six places to the right.

Step 2 ：The decimal form of \(5.251 \times 10^{6}\) is \(5251000.0\). However, since there are no decimal places, we can drop the .0 and just write the number as \(5251000\).

Step 3 ：Final Answer: \(\boxed{5251000}\)