315143430205 has 4 divisors (see below), whose sum is σ = 378172116252. Its totient is φ = 252114744160.

The previous prime is 315143430197. The next prime is 315143430209. The reversal of 315143430205 is 502034341513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502034341513 = 631 ⋅795617023.

It can be written as a sum of positive squares in 2 ways, for example, as 126459183321 + 188684246884 = 355611^2 + 434378^2 .

It is not a de Polignac number, because 315143430205 - 2³ = 315143430197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315143430209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31514343016 + ... + 31514343025.

It is an arithmetic number, because the mean of its divisors is an integer number (94543029063).

Almost surely, 2^315143430205 is an apocalyptic number.

It is an amenable number.

315143430205 is a deficient number, since it is larger than the sum of its proper divisors (63028686047).

315143430205 is an equidigital number, since it uses as much as digits as its factorization.

315143430205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63028686046.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 315143430205 its reverse (502034341513), we get a palindrome (817177771718).

The spelling of 315143430205 in words is "three hundred fifteen billion, one hundred forty-three million, four hundred thirty thousand, two hundred five".