31313132132 has 12 divisors (see below), whose sum is σ = 55282919916. Its totient is φ = 15518012160.

The previous prime is 31313132129. The next prime is 31313132189. The reversal of 31313132132 is 23123131313.

It can be written as a sum of positive squares in 2 ways, for example, as 4346237476 + 26966894656 = 65926^2 + 164216^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31313132098 and 31313132107.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 34637969 + ... + 34638872.

It is an arithmetic number, because the mean of its divisors is an integer number (4606909993).

Almost surely, 2^31313132132 is an apocalyptic number.

It is an amenable number.

31313132132 is a deficient number, since it is larger than the sum of its proper divisors (23969787784).

31313132132 is a wasteful number, since it uses less digits than its factorization.

31313132132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69276958 (or 69276956 counting only the distinct ones).

The product of its digits is 972, while the sum is 23.

Adding to 31313132132 its reverse (23123131313), we get a palindrome (54436263445).

The spelling of 31313132132 in words is "thirty-one billion, three hundred thirteen million, one hundred thirty-two thousand, one hundred thirty-two".