311214216 has 16 divisors (see below), whose sum is σ = 778035600. Its totient is φ = 103738064.

The previous prime is 311214199. The next prime is 311214217. The reversal of 311214216 is 612412113.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 311214192 and 311214201.

It is not an unprimeable number, because it can be changed into a prime (311214217) 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, 6483606 + ... + 6483653.

It is an arithmetic number, because the mean of its divisors is an integer number (48627225).

Almost surely, 2^311214216 is an apocalyptic number.

It is an amenable number.

311214216 is an abundant number, since it is smaller than the sum of its proper divisors (466821384).

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

311214216 is a wasteful number, since it uses less digits than its factorization.

311214216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12967268 (or 12967264 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

The square root of 311214216 is about 17641.2645805226. The cubic root of 311214216 is about 677.6724168234.

Adding to 311214216 its reverse (612412113), we get a palindrome (923626329).

The spelling of 311214216 in words is "three hundred eleven million, two hundred fourteen thousand, two hundred sixteen".