31313212232 has 8 divisors (see below), whose sum is σ = 58712272950. Its totient is φ = 15656606112.

The previous prime is 31313212213. The next prime is 31313212279. The reversal of 31313212232 is 23221231313.

It can be written as a sum of positive squares in only one way, i.e., 28269041956 + 3044170276 = 168134^2 + 55174^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 31313212198 and 31313212207.

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 as a sum of consecutive naturals, namely, 1957075757 + ... + 1957075772.

Almost surely, 2^31313212232 is an apocalyptic number.

It is an amenable number.

31313212232 is a deficient number, since it is larger than the sum of its proper divisors (27399060718).

31313212232 is a wasteful number, since it uses less digits than its factorization.

31313212232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3914151535 (or 3914151531 counting only the distinct ones).

The product of its digits is 1296, while the sum is 23.

Adding to 31313212232 its reverse (23221231313), we get a palindrome (54534443545).

The spelling of 31313212232 in words is "thirty-one billion, three hundred thirteen million, two hundred twelve thousand, two hundred thirty-two".