312548913 has 18 divisors (see below), whose sum is σ = 466505442. Its totient is φ = 201638880.

The previous prime is 312548891. The next prime is 312548939. The reversal of 312548913 is 319845213.

It can be written as a sum of positive squares in only one way, i.e., 277122609 + 35426304 = 16647^2 + 5952^2 .

It is not a de Polignac number, because 312548913 - 2¹⁴ = 312532529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312548413) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9420 + ... + 26717.

It is an arithmetic number, because the mean of its divisors is an integer number (25916969).

Almost surely, 2^312548913 is an apocalyptic number.

It is an amenable number.

312548913 is a deficient number, since it is larger than the sum of its proper divisors (153956529).

312548913 is a wasteful number, since it uses less digits than its factorization.

312548913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36205 (or 36171 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 312548913 is about 17679.0529440918. The cubic root of 312548913 is about 678.6398077174.

The spelling of 312548913 in words is "three hundred twelve million, five hundred forty-eight thousand, nine hundred thirteen".