311231012 has 6 divisors (see below), whose sum is σ = 544654278. Its totient is φ = 155615504.

The previous prime is 311231003. The next prime is 311231017. The reversal of 311231012 is 210132113.

311231012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 281702656 + 29528356 = 16784^2 + 5434^2 .

It is not an unprimeable number, because it can be changed into a prime (311231017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38903873 + ... + 38903880.

It is an arithmetic number, because the mean of its divisors is an integer number (90775713).

Almost surely, 2^311231012 is an apocalyptic number.

It is an amenable number.

311231012 is a deficient number, since it is larger than the sum of its proper divisors (233423266).

311231012 is a wasteful number, since it uses less digits than its factorization.

311231012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77807757 (or 77807755 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 311231012 is about 17641.7406170706. The cubic root of 311231012 is about 677.6846077630.

Adding to 311231012 its reverse (210132113), we get a palindrome (521363125).

The spelling of 311231012 in words is "three hundred eleven million, two hundred thirty-one thousand, twelve".