12278552225 has 12 divisors (see below), whose sum is σ = 15242000640. Its totient is φ = 9812134800.

The previous prime is 12278552207. The next prime is 12278552227. The reversal of 12278552225 is 52225587221.

It is not a de Polignac number, because 12278552225 - 2⁶ = 12278552161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12278552227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 244241 + ... + 290190.

It is an arithmetic number, because the mean of its divisors is an integer number (1270166720).

Almost surely, 2^12278552225 is an apocalyptic number.

It is an amenable number.

12278552225 is a deficient number, since it is larger than the sum of its proper divisors (2963448415).

12278552225 is an equidigital number, since it uses as much as digits as its factorization.

12278552225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535360 (or 535355 counting only the distinct ones).

The product of its digits is 224000, while the sum is 41.

The spelling of 12278552225 in words is "twelve billion, two hundred seventy-eight million, five hundred fifty-two thousand, two hundred twenty-five".