311320012 has 6 divisors (see below), whose sum is σ = 544810028. Its totient is φ = 155660004.

The previous prime is 311320007. The next prime is 311320013. The reversal of 311320012 is 210023113.

It is a junction number, because it is equal to n+sod(n) for n = 311319974 and 311320001.

It is not an unprimeable number, because it can be changed into a prime (311320013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38914998 + ... + 38915005.

Almost surely, 2^311320012 is an apocalyptic number.

It is an amenable number.

311320012 is a deficient number, since it is larger than the sum of its proper divisors (233490016).

311320012 is a wasteful number, since it uses less digits than its factorization.

311320012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77830007 (or 77830005 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 311320012 is about 17644.2628636053. The cubic root of 311320012 is about 677.7491987790.

Adding to 311320012 its reverse (210023113), we get a palindrome (521343125).

The spelling of 311320012 in words is "three hundred eleven million, three hundred twenty thousand, twelve".