361

361 is a natural number that follows 360 and precedes 362. It is a perfect square, being 19 squared.

In number theory, 361 has divisors 1, 19, and 361, with prime factorization 19^2. It is an odd composite number. It can be expressed as the sum of the first 19 odd numbers, illustrating the identity that n^2 equals the sum of the first n odd numbers. In binary, 361 is represented as 101101001.

As a calendar year, 361 CE is notable for the death of Roman Emperor Constantius II and the rise of Julian the Apostate, who was proclaimed emperor after Constantius’s death.

In modern usage, 361 is the North American area code serving parts of southern Texas, including Corpus Christi and Victoria. It is used for telephone numbering in that region.