315097508185 has 4 divisors (see below), whose sum is σ = 378117009828. Its totient is φ = 252078006544.

The previous prime is 315097508179. The next prime is 315097508213. The reversal of 315097508185 is 581805790513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 581805790513 = 247241 ⋅2353193.

It can be written as a sum of positive squares in 2 ways, for example, as 204974413081 + 110123095104 = 452741^2 + 331848^2 .

It is a cyclic number.

It is not a de Polignac number, because 315097508185 - 2⁷ = 315097508057 is a prime.

It is a super-2 number, since 2×315097508185² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 31509750814 + ... + 31509750823.

It is an arithmetic number, because the mean of its divisors is an integer number (94529252457).

Almost surely, 2^315097508185 is an apocalyptic number.

It is an amenable number.

315097508185 is a deficient number, since it is larger than the sum of its proper divisors (63019501643).

315097508185 is an equidigital number, since it uses as much as digits as its factorization.

315097508185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63019501642.

The product of its (nonzero) digits is 1512000, while the sum is 52.

The spelling of 315097508185 in words is "three hundred fifteen billion, ninety-seven million, five hundred eight thousand, one hundred eighty-five".