312513385 has 4 divisors (see below), whose sum is σ = 375016068. Its totient is φ = 250010704.

The previous prime is 312513361. The next prime is 312513391. The reversal of 312513385 is 583315213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 92525161 + 219988224 = 9619^2 + 14832^2 .

It is a cyclic number.

It is not a de Polignac number, because 312513385 - 2¹⁷ = 312382313 is a prime.

It is a Duffinian 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, 31251334 + ... + 31251343.

It is an arithmetic number, because the mean of its divisors is an integer number (93754017).

Almost surely, 2^312513385 is an apocalyptic number.

It is an amenable number.

312513385 is a deficient number, since it is larger than the sum of its proper divisors (62502683).

312513385 is an equidigital number, since it uses as much as digits as its factorization.

312513385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62502682.

The product of its digits is 10800, while the sum is 31.

The square root of 312513385 is about 17678.0481105805. The cubic root of 312513385 is about 678.6140926717.

Adding to 312513385 its reverse (583315213), we get a palindrome (895828598).

The spelling of 312513385 in words is "three hundred twelve million, five hundred thirteen thousand, three hundred eighty-five".