315215043242 has 12 divisors (see below), whose sum is σ = 519714059298. Its totient is φ = 143279565000.

The previous prime is 315215043173. The next prime is 315215043277. The reversal of 315215043242 is 242340512513.

It can be written as a sum of positive squares in only one way, i.e., 290888714281 + 24326328961 = 539341^2 + 155969^2 .

It is a junction number, because it is equal to n+sod(n) for n = 315215043199 and 315215043208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 651270509 + ... + 651270992.

Almost surely, 2^315215043242 is an apocalyptic number.

315215043242 is a deficient number, since it is larger than the sum of its proper divisors (204499016056).

315215043242 is a wasteful number, since it uses less digits than its factorization.

315215043242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302541525 (or 1302541514 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 315215043242 its reverse (242340512513), we get a palindrome (557555555755).

The spelling of 315215043242 in words is "three hundred fifteen billion, two hundred fifteen million, forty-three thousand, two hundred forty-two".