244 (number)

• the sum of two nonzero fifth powers.
• palindromic in bases 3, 11, 60, 121, 243.
• a Harshad number in bases 3, 9, 11, 61, 62, 81, 121, 122, 123 and 184.
• the second anti-perfect number, meaning that reversing the digits of the proper divisors of 244 and adding the results gives 244 back again.
• part of the sequence 1, 2, 4, 8, 61, 221, 244,... in which each number is formed by reversing the digits of the double of the previous number.
• the number of non-isomorphic set-systems of weight 8