12445031331 has 36 divisors (see below), whose sum is σ = 19017040120. Its totient is φ = 7842514176.

The previous prime is 12445031311. The next prime is 12445031381. The reversal of 12445031331 is 13313054421.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

12445031331 is a `hidden beast` number, since 1 + 24 + 4 + 503 + 133 + 1 = 666.

12445031331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12445031331 - 2⁶ = 12445031267 is a prime.

It is a super-2 number, since 2×12445031331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12445031295 and 12445031304.

It is not an unprimeable number, because it can be changed into a prime (12445031311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 27716995 + ... + 27717443.

Almost surely, 2^12445031331 is an apocalyptic number.

12445031331 is a deficient number, since it is larger than the sum of its proper divisors (6572008789).

12445031331 is an frugal number, since it uses more digits than its factorization.

12445031331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 12445031331 its reverse (13313054421), we get a palindrome (25758085752).

The spelling of 12445031331 in words is "twelve billion, four hundred forty-five million, thirty-one thousand, three hundred thirty-one".