13133431312 has 20 divisors (see below), whose sum is σ = 25451546220. Its totient is φ = 6565290368.

The previous prime is 13133431253. The next prime is 13133431361. The reversal of 13133431312 is 21313433131.

It can be written as a sum of positive squares in 2 ways, for example, as 7109187856 + 6024243456 = 84316^2 + 77616^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10987 + ... + 162442.

It is an arithmetic number, because the mean of its divisors is an integer number (1272577311).

Almost surely, 2^13133431312 is an apocalyptic number.

It is an amenable number.

13133431312 is a deficient number, since it is larger than the sum of its proper divisors (12318114908).

13133431312 is a wasteful number, since it uses less digits than its factorization.

13133431312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178170 (or 178164 counting only the distinct ones).

The product of its digits is 1944, while the sum is 25.

Adding to 13133431312 its reverse (21313433131), we get a palindrome (34446864443).

The spelling of 13133431312 in words is "thirteen billion, one hundred thirty-three million, four hundred thirty-one thousand, three hundred twelve".