Is it a balanced number?
05AB1E, 14 7 bytes

€D2äO`Q


Explanation

Using 141 as example:

€D       # duplicate each (turns the number into a list of digits)
         # STACK: ['1','1','4','4','1','1']
  2ä     # split list in 2 (as we duplicated each element, 
         # the middle element will exist on both sides for an odd length input
         # STACK: [['1','1','4'],['4','1','1']]
    O    # sum each sublist
         # STACK: [6,6]
     `   # flatten
         # STACK: 6, 6
      Q  # compare for equality
         # STACK: 1 (true)


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