311023212 has 48 divisors (see below), whose sum is σ = 745621632. Its totient is φ = 100846720.

The previous prime is 311023189. The next prime is 311023249. The reversal of 311023212 is 212320113.

It is a junction number, because it is equal to n+sod(n) for n = 311023191 and 311023200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217243 + ... + 218669.

It is an arithmetic number, because the mean of its divisors is an integer number (15533784).

Almost surely, 2^311023212 is an apocalyptic number.

It is an amenable number.

311023212 is an abundant number, since it is smaller than the sum of its proper divisors (434598420).

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

311023212 is a wasteful number, since it uses less digits than its factorization.

311023212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918 (or 1916 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 311023212 is about 17635.8501921512. The cubic root of 311023212 is about 677.5337506731.

Adding to 311023212 its reverse (212320113), we get a palindrome (523343325).

The spelling of 311023212 in words is "three hundred eleven million, twenty-three thousand, two hundred twelve".