312665612 has 12 divisors (see below), whose sum is σ = 625331280. Its totient is φ = 133999536.

The previous prime is 312665593. The next prime is 312665621. The reversal of 312665612 is 216566213.

312665612 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5583287 + ... + 5583342.

It is an arithmetic number, because the mean of its divisors is an integer number (52110940).

Almost surely, 2^312665612 is an apocalyptic number.

It is an amenable number.

312665612 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

312665612 is a wasteful number, since it uses less digits than its factorization.

312665612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11166640 (or 11166638 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 312665612 is about 17682.3531239482. The cubic root of 312665612 is about 678.7242603464.

The spelling of 312665612 in words is "three hundred twelve million, six hundred sixty-five thousand, six hundred twelve".