12031431325 has 6 divisors (see below), whose sum is σ = 14918974874. Its totient is φ = 9625145040.

The previous prime is 12031431323. The next prime is 12031431329. The reversal of 12031431325 is 52313413021.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3468149881 + 8563281444 = 58891^2 + 92538^2 .

It is not a de Polignac number, because 12031431325 - 2¹ = 12031431323 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 481257253 = 12031431325 / (1 + 2 + 0 + 3 + 1 + 4 + 3 + 1 + 3 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12031431325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031431323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 240628602 + ... + 240628651.

Almost surely, 2^12031431325 is an apocalyptic number.

It is an amenable number.

12031431325 is a deficient number, since it is larger than the sum of its proper divisors (2887543549).

12031431325 is an equidigital number, since it uses as much as digits as its factorization.

12031431325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481257263 (or 481257258 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 12031431325 its reverse (52313413021), we get a palindrome (64344844346).

The spelling of 12031431325 in words is "twelve billion, thirty-one million, four hundred thirty-one thousand, three hundred twenty-five".