315811242 has 48 divisors (see below), whose sum is σ = 695665152. Its totient is φ = 103530240.

The previous prime is 315811241. The next prime is 315811273. The reversal of 315811242 is 242118513.

315811242 is a `hidden beast` number, since 31 + 581 + 12 + 42 = 666.

It is not an unprimeable number, because it can be changed into a prime (315811241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 333013 + ... + 333959.

It is an arithmetic number, because the mean of its divisors is an integer number (14493024).

Almost surely, 2^315811242 is an apocalyptic number.

315811242 is an abundant number, since it is smaller than the sum of its proper divisors (379853910).

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

315811242 is a wasteful number, since it uses less digits than its factorization.

315811242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243 (or 1240 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 315811242 is about 17771.0788079959. The cubic root of 315811242 is about 680.9928130326.

Adding to 315811242 its reverse (242118513), we get a palindrome (557929755).

It can be divided in two parts, 31581 and 1242, that added together give a palindrome (32823).

The spelling of 315811242 in words is "three hundred fifteen million, eight hundred eleven thousand, two hundred forty-two".