jquery.animateNumber.js

  $.fn.digits = function(){
      return this.each(function(){
          $(this).text( $(this).text().replace(/(\d)(?=(\d\d\d)+(?!\d))/g, "$1,") );
      })
  }
      
  $('#animateItem').each(function () {
    $(this).prop('Counter',0).animate({
        Counter: $(this).text()
    }, {
        duration: 2000,
        easing: 'swing',
        step: function (now) {
            $(this).text(Math.ceil(now)).digits();
        }
    });
  });