These are the show notes for episode 58 of the Travels in a Mathematical World Podcast. 58 is the smallest Smith number with a prime sum of digits. A Smith number is a composite number for which the sum of its digits equals the sum of all the digits appearing in its prime divisors. More about 58 from Number Gossip. You can find more than you ever wanted to know about Smith numbers at shyamsundergupta.com.

Ben Beech talks about his work for National Air Traffic Control, Swanwick. This recording was made during a careers event at the University of Portsmouth. At the time of recording, Ben was nearing the end of his training.

Plus has an interview with a military air traffic controller, “Career interview: Military air traffic controller“. The BBC have an interview with a Ground Movement controller.

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