315311240 has 32 divisors (see below), whose sum is σ = 751184280. Its totient is φ = 118705152.

The previous prime is 315311237. The next prime is 315311317. The reversal of 315311240 is 42113513.

It can be written as a sum of positive squares in 4 ways, for example, as 293985316 + 21325924 = 17146^2 + 4618^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231167 + ... + 232526.

Almost surely, 2^315311240 is an apocalyptic number.

It is an amenable number.

315311240 is an abundant number, since it is smaller than the sum of its proper divisors (435873040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

315311240 is a wasteful number, since it uses less digits than its factorization.

315311240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463721 (or 463717 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 315311240 is about 17757.0053781599. The cubic root of 315311240 is about 680.6332336627.

Adding to 315311240 its reverse (42113513), we get a palindrome (357424753).

The spelling of 315311240 in words is "three hundred fifteen million, three hundred eleven thousand, two hundred forty".