315431845 has 16 divisors (see below), whose sum is σ = 389532528. Its totient is φ = 245030400.

The previous prime is 315431833. The next prime is 315431849. The reversal of 315431845 is 548134513.

315431845 = 12558² + 12559².

It can be written as a sum of positive squares in 8 ways, for example, as 617796 + 314814049 = 786^2 + 17743^2 .

It is not a de Polignac number, because 315431845 - 2⁷ = 315431717 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 315431845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315431849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109767 + ... + 112603.

It is an arithmetic number, because the mean of its divisors is an integer number (24345783).

Almost surely, 2^315431845 is an apocalyptic number.

315431845 is the 12559-th centered square number.

It is an amenable number.

315431845 is a deficient number, since it is larger than the sum of its proper divisors (74100683).

315431845 is a wasteful number, since it uses less digits than its factorization.

315431845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3480.

The product of its digits is 28800, while the sum is 34.

The square root of 315431845 is about 17760.4010371388. The cubic root of 315431845 is about 680.7200022233.

The spelling of 315431845 in words is "three hundred fifteen million, four hundred thirty-one thousand, eight hundred forty-five".