312310212 has 24 divisors (see below), whose sum is σ = 732544512. Its totient is φ = 103557600.

The previous prime is 312310211. The next prime is 312310217. The reversal of 312310212 is 212013213.

It is a junction number, because it is equal to n+sod(n) for n = 312310191 and 312310200.

It is not an unprimeable number, because it can be changed into a prime (312310211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65839 + ... + 70422.

It is an arithmetic number, because the mean of its divisors is an integer number (30522688).

Almost surely, 2^312310212 is an apocalyptic number.

It is an amenable number.

312310212 is an abundant number, since it is smaller than the sum of its proper divisors (420234300).

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

312310212 is a wasteful number, since it uses less digits than its factorization.

312310212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136459 (or 136457 counting only the distinct ones).

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

The square root of 312310212 is about 17672.3006991167. The cubic root of 312310212 is about 678.4669992912.

Adding to 312310212 its reverse (212013213), we get a palindrome (524323425).

The spelling of 312310212 in words is "three hundred twelve million, three hundred ten thousand, two hundred twelve".