Adding featured images to queries posts

I am trying to get featured images to pull through on a query that I have found;

<?php
$post_id = 22;
$queried_post = get_post($post_id);
?>
<h2 style=”text-align:center;”><?php echo $queried_post->post_title; ?></h2>
<p><?php echo $queried_post->post_content; ?></p>

I tried

<?php echo $queried_post->the_post_thumbnail(); ?>

But it didn’t work, any ideas?