312640315 has 16 divisors (see below), whose sum is σ = 413427168. Its totient is φ = 225501696.

The previous prime is 312640313. The next prime is 312640331. The reversal of 312640315 is 513046213.

It is a cyclic number.

It is not a de Polignac number, because 312640315 - 2¹ = 312640313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312640315.

It is not an unprimeable number, because it can be changed into a prime (312640313) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 53134 + ... + 58723.

It is an arithmetic number, because the mean of its divisors is an integer number (25839198).

Almost surely, 2^312640315 is an apocalyptic number.

312640315 is a deficient number, since it is larger than the sum of its proper divisors (100786853).

312640315 is a wasteful number, since it uses less digits than its factorization.

312640315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111918.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 312640315 is about 17681.6377917884. The cubic root of 312640315 is about 678.7059552199.

Adding to 312640315 its reverse (513046213), we get a palindrome (825686528).

The spelling of 312640315 in words is "three hundred twelve million, six hundred forty thousand, three hundred fifteen".