315821135079 has 14 divisors (see below), whose sum is σ = 473515091136. Its totient is φ = 210547422900.

The previous prime is 315821134997. The next prime is 315821135117. The reversal of 315821135079 is 970531128513.

315821135079 is a `hidden beast` number, since 3 + 1 + 582 + 1 + 13 + 50 + 7 + 9 = 666.

It is not a de Polignac number, because 315821135079 - 2⁹ = 315821134567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315821131079) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 216611847 + ... + 216613304.

Almost surely, 2^315821135079 is an apocalyptic number.

315821135079 is a deficient number, since it is larger than the sum of its proper divisors (157693956057).

315821135079 is an frugal number, since it uses more digits than its factorization.

315821135079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433225169 (or 433225154 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The spelling of 315821135079 in words is "three hundred fifteen billion, eight hundred twenty-one million, one hundred thirty-five thousand, seventy-nine".