315143202145 has 4 divisors (see below), whose sum is σ = 378171842580. Its totient is φ = 252114561712.

The previous prime is 315143202139. The next prime is 315143202149. The reversal of 315143202145 is 541202341513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541202341513 = 61 ⋅8872169533.

It can be written as a sum of positive squares in 2 ways, for example, as 46056164449 + 269087037696 = 214607^2 + 518736^2 .

It is a cyclic number.

It is not a de Polignac number, because 315143202145 - 2⁵ = 315143202113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (315143202149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31514320210 + ... + 31514320219.

It is an arithmetic number, because the mean of its divisors is an integer number (94542960645).

Almost surely, 2^315143202145 is an apocalyptic number.

It is an amenable number.

315143202145 is a deficient number, since it is larger than the sum of its proper divisors (63028640435).

315143202145 is an equidigital number, since it uses as much as digits as its factorization.

315143202145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63028640434.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 315143202145 its reverse (541202341513), we get a palindrome (856345543658).

The spelling of 315143202145 in words is "three hundred fifteen billion, one hundred forty-three million, two hundred two thousand, one hundred forty-five".