312315705 has 96 divisors (see below), whose sum is σ = 613476864. Its totient is φ = 145939968.

The previous prime is 312315701. The next prime is 312315709. The reversal of 312315705 is 507513213.

It is an interprime number because it is at equal distance from previous prime (312315701) and next prime (312315709).

It is not a de Polignac number, because 312315705 - 2² = 312315701 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (312315701) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1017162 + ... + 1017468.

It is an arithmetic number, because the mean of its divisors is an integer number (6390384).

Almost surely, 2^312315705 is an apocalyptic number.

It is an amenable number.

312315705 is a deficient number, since it is larger than the sum of its proper divisors (301161159).

312315705 is a wasteful number, since it uses less digits than its factorization.

312315705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 412 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 27.

The square root of 312315705 is about 17672.4561111352. The cubic root of 312315705 is about 678.4709769574.

Adding to 312315705 its reverse (507513213), we get a palindrome (819828918).

The spelling of 312315705 in words is "three hundred twelve million, three hundred fifteen thousand, seven hundred five".