With no immediate connotations or connections, this abstract domain name could work for a huge range of companies.
The name "x3e" has only three letters and just two syllables. Two-syllable names are very rare and exceptionally desirable. Successful brands using two syllable names include Visa, Google and Walgreens.
This domain was first registered in March 2004. Older domains have an advantage when ranking in search engines.
X3e.com is a .com domain. Dot com domains are the most valuable top-level-domain in the world, famously used by websites like youtube.com. Once you own a .com, it will be much easier to rank for your own name in Google.