31163210312 has 16 divisors (see below), whose sum is σ = 62925713340. Its totient is φ = 14383020096.

The previous prime is 31163210293. The next prime is 31163210317. The reversal of 31163210312 is 21301236113.

It can be written as a sum of positive squares in 2 ways, for example, as 31090858276 + 72352036 = 176326^2 + 8506^2 .

It is a super-2 number, since 2×31163210312² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31163210317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149823023 + ... + 149823230.

Almost surely, 2^31163210312 is an apocalyptic number.

It is an amenable number.

31163210312 is an abundant number, since it is smaller than the sum of its proper divisors (31762503028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31163210312 is a wasteful number, since it uses less digits than its factorization.

31163210312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299646272 (or 299646268 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31163210312 its reverse (21301236113), we get a palindrome (52464446425).

The spelling of 31163210312 in words is "thirty-one billion, one hundred sixty-three million, two hundred ten thousand, three hundred twelve".