144220225 has 6 divisors (see below), whose sum is σ = 178833110. Its totient is φ = 115376160.

The previous prime is 144220207. The next prime is 144220273. The reversal of 144220225 is 522022441.

It can be written as a sum of positive squares in 3 ways, for example, as 26801329 + 117418896 = 5177^2 + 10836^2 .

It is not a de Polignac number, because 144220225 - 2¹¹ = 144218177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 144220196 and 144220205.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2884380 + ... + 2884429.

Almost surely, 2^144220225 is an apocalyptic number.

It is an amenable number.

144220225 is a deficient number, since it is larger than the sum of its proper divisors (34612885).

144220225 is an equidigital number, since it uses as much as digits as its factorization.

144220225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5768819 (or 5768814 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 144220225 is about 12009.1725360243. The cubic root of 144220225 is about 524.4153431021.

Adding to 144220225 its reverse (522022441), we get a palindrome (666242666).

The spelling of 144220225 in words is "one hundred forty-four million, two hundred twenty thousand, two hundred twenty-five".