312231212 has 12 divisors (see below), whose sum is σ = 546528360. Its totient is φ = 156080256.

The previous prime is 312231209. The next prime is 312231217. The reversal of 312231212 is 212132213.

It is not an unprimeable number, because it can be changed into a prime (312231217) 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, 29903 + ... + 38969.

It is an arithmetic number, because the mean of its divisors is an integer number (45544030).

Almost surely, 2^312231212 is an apocalyptic number.

It is an amenable number.

312231212 is a deficient number, since it is larger than the sum of its proper divisors (234297148).

312231212 is a wasteful number, since it uses less digits than its factorization.

312231212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17680 (or 17678 counting only the distinct ones).

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

The square root of 312231212 is about 17670.0654214975. The cubic root of 312231212 is about 678.4097875715.

Adding to 312231212 its reverse (212132213), we get a palindrome (524363425).

The spelling of 312231212 in words is "three hundred twelve million, two hundred thirty-one thousand, two hundred twelve".