311420312 has 16 divisors (see below), whose sum is σ = 667329360. Its totient is φ = 133465824.

The previous prime is 311420287. The next prime is 311420321. The reversal of 311420312 is 213024113.

It is a super-2 number, since 2×311420312² = 193965221452354688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2780483 + ... + 2780594.

It is an arithmetic number, because the mean of its divisors is an integer number (41708085).

Almost surely, 2^311420312 is an apocalyptic number.

It is an amenable number.

311420312 is an abundant number, since it is smaller than the sum of its proper divisors (355909048).

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

311420312 is a wasteful number, since it uses less digits than its factorization.

311420312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5561090 (or 5561086 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 311420312 is about 17647.1049183712. The cubic root of 311420312 is about 677.8219759247.

Adding to 311420312 its reverse (213024113), we get a palindrome (524444425).

The spelling of 311420312 in words is "three hundred eleven million, four hundred twenty thousand, three hundred twelve".