312531612 has 12 divisors (see below), whose sum is σ = 729240456. Its totient is φ = 104177200.

The previous prime is 312531577. The next prime is 312531629. The reversal of 312531612 is 216135213.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13022139 + ... + 13022162.

It is an arithmetic number, because the mean of its divisors is an integer number (60770038).

Almost surely, 2^312531612 is an apocalyptic number.

It is an amenable number.

312531612 is an abundant number, since it is smaller than the sum of its proper divisors (416708844).

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

312531612 is a wasteful number, since it uses less digits than its factorization.

312531612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26044308 (or 26044306 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 312531612 is about 17678.5636294355. The cubic root of 312531612 is about 678.6272855558.

Adding to 312531612 its reverse (216135213), we get a palindrome (528666825).

The spelling of 312531612 in words is "three hundred twelve million, five hundred thirty-one thousand, six hundred twelve".