1313444225 has 24 divisors (see below), whose sum is σ = 1766558808. Its totient is φ = 964812800.

The previous prime is 1313444213. The next prime is 1313444227. The reversal of 1313444225 is 5224443131.

It can be written as a sum of positive squares in 12 ways, for example, as 235438336 + 1078005889 = 15344^2 + 32833^2 .

It is not a de Polignac number, because 1313444225 - 2²⁰ = 1312395649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1313444227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20264 + ... + 55113.

It is an arithmetic number, because the mean of its divisors is an integer number (73606617).

Almost surely, 2^1313444225 is an apocalyptic number.

It is an amenable number.

1313444225 is a deficient number, since it is larger than the sum of its proper divisors (453114583).

1313444225 is a wasteful number, since it uses less digits than its factorization.

1313444225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75445 (or 75440 counting only the distinct ones).

The product of its digits is 11520, while the sum is 29.

The square root of 1313444225 is about 36241.4710656176. The cubic root of 1313444225 is about 1095.1422776837.

Adding to 1313444225 its reverse (5224443131), we get a palindrome (6537887356).

The spelling of 1313444225 in words is "one billion, three hundred thirteen million, four hundred forty-four thousand, two hundred twenty-five".