535

535 is an integer that can refer to several different topics. As a number, it follows 534 and precedes 536. In mathematics, 535 is an odd composite number with prime factorization 5 × 107. It is a semiprime and, in decimal notation, is a palindromic number since it reads the same forward and backward. In Roman numerals, 535 is written as DXXXV.

As a year, 535 CE (AD 535) is notable for significant climatic disturbances that scholars associate with the early phase of the Late Antique Little Ice Age. Volcanic eruptions in the mid-6th century are believed to have cooled global temperatures for several years, causing crop failures and food shortages across parts of Europe, the Middle East, and Asia. These environmental stresses contributed to social and political difficulties in various regions, and the large outbreak of the Justinian plague began in 541, a few years later, during the broader period of upheaval.

Beyond its mathematical and chronological uses, 535 does not have a single, globally standardized meaning. It commonly appears as a numeric designation in lists, catalogs, or datasets, and can serve as an index or identifier in various systems.