315215144042 has 4 divisors (see below), whose sum is σ = 472822716066. Its totient is φ = 157607572020.

The previous prime is 315215144021. The next prime is 315215144059. The reversal of 315215144042 is 240441512513.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 194612440201 + 120602703841 = 441149^2 + 347279^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78803786009 + ... + 78803786012.

Almost surely, 2^315215144042 is an apocalyptic number.

315215144042 is a deficient number, since it is larger than the sum of its proper divisors (157607572024).

315215144042 is a wasteful number, since it uses less digits than its factorization.

315215144042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157607572023.

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 315215144042 its reverse (240441512513), we get a palindrome (555656656555).

The spelling of 315215144042 in words is "three hundred fifteen billion, two hundred fifteen million, one hundred forty-four thousand, forty-two".