1312222225 has 6 divisors (see below), whose sum is σ = 1627155590. Its totient is φ = 1049777760.

The previous prime is 1312222217. The next prime is 1312222237. The reversal of 1312222225 is 5222222131.

It can be written as a sum of positive squares in 3 ways, for example, as 426505104 + 885717121 = 20652^2 + 29761^2 .

It is not a de Polignac number, because 1312222225 - 2³ = 1312222217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1312222196 and 1312222205.

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, 26244420 + ... + 26244469.

Almost surely, 2^1312222225 is an apocalyptic number.

It is an amenable number.

1312222225 is a deficient number, since it is larger than the sum of its proper divisors (314933365).

1312222225 is an equidigital number, since it uses as much as digits as its factorization.

1312222225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52488899 (or 52488894 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 1312222225 is about 36224.6080034001. The cubic root of 1312222225 is about 1094.8025400983.

Adding to 1312222225 its reverse (5222222131), we get a palindrome (6534444356).

The spelling of 1312222225 in words is "one billion, three hundred twelve million, two hundred twenty-two thousand, two hundred twenty-five".