312431212 has 24 divisors (see below), whose sum is σ = 576576000. Its totient is φ = 147725136.

The previous prime is 312431179. The next prime is 312431221. The reversal of 312431212 is 212134213.

It is a happy number.

It is a super-2 number, since 2×312431212² = 195226524463577888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 312431212.

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, 42093 + ... + 48955.

It is an arithmetic number, because the mean of its divisors is an integer number (24024000).

Almost surely, 2^312431212 is an apocalyptic number.

It is an amenable number.

312431212 is a deficient number, since it is larger than the sum of its proper divisors (264144788).

312431212 is a wasteful number, since it uses less digits than its factorization.

312431212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7485 (or 7483 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 312431212 is about 17675.7238041332. The cubic root of 312431212 is about 678.5546086658.

Adding to 312431212 its reverse (212134213), we get a palindrome (524565425).

The spelling of 312431212 in words is "three hundred twelve million, four hundred thirty-one thousand, two hundred twelve".