311142012 has 24 divisors (see below), whose sum is σ = 739697616. Its totient is φ = 101756928.

The previous prime is 311142011. The next prime is 311142031. The reversal of 311142012 is 210241113.

311142012 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

311142012 is strictly pandigital in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 311141982 and 311142000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311142011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243973 + ... + 245244.

It is an arithmetic number, because the mean of its divisors is an integer number (30820734).

Almost surely, 2^311142012 is an apocalyptic number.

It is an amenable number.

311142012 is an abundant number, since it is smaller than the sum of its proper divisors (428555604).

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

311142012 is a wasteful number, since it uses less digits than its factorization.

311142012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489277 (or 489275 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 311142012 is about 17639.2180098779. The cubic root of 311142012 is about 677.6200044321.

Adding to 311142012 its reverse (210241113), we get a palindrome (521383125).

The spelling of 311142012 in words is "three hundred eleven million, one hundred forty-two thousand, twelve".