311214220 has 24 divisors (see below), whose sum is σ = 668750544. Its totient is φ = 121590336.

The previous prime is 311214217. The next prime is 311214271. The reversal of 311214220 is 22412113.

It is a junction number, because it is equal to n+sod(n) for n = 311214194 and 311214203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180079 + ... + 181798.

It is an arithmetic number, because the mean of its divisors is an integer number (27864606).

Almost surely, 2^311214220 is an apocalyptic number.

It is an amenable number.

311214220 is an abundant number, since it is smaller than the sum of its proper divisors (357536324).

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

311214220 is a wasteful number, since it uses less digits than its factorization.

311214220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361929 (or 361927 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 311214220 is about 17641.2646938931. The cubic root of 311214220 is about 677.6724197267.

Adding to 311214220 its reverse (22412113), we get a palindrome (333626333).

The spelling of 311214220 in words is "three hundred eleven million, two hundred fourteen thousand, two hundred twenty".