315093509172 has 72 divisors (see below), whose sum is σ = 862712893224. Its totient is φ = 96391408896.

The previous prime is 315093509113. The next prime is 315093509173. The reversal of 315093509172 is 271905390513.

315093509172 is a `hidden beast` number, since 3 + 1 + 50 + 93 + 509 + 1 + 7 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 116414710416 + 198678798756 = 341196^2 + 445734^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315093509173) 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, 1864923 + ... + 2026850.

It is an arithmetic number, because the mean of its divisors is an integer number (11982123517).

Almost surely, 2^315093509172 is an apocalyptic number.

It is an amenable number.

315093509172 is an abundant number, since it is smaller than the sum of its proper divisors (547619384052).

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

315093509172 is a wasteful number, since it uses less digits than its factorization.

315093509172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3891969 (or 3891964 counting only the distinct ones).

The product of its (nonzero) digits is 255150, while the sum is 45.

Adding to 315093509172 its reverse (271905390513), we get a palindrome (586998899685).

The spelling of 315093509172 in words is "three hundred fifteen billion, ninety-three million, five hundred nine thousand, one hundred seventy-two".