315728587443 has 4 divisors (see below), whose sum is σ = 420971449928. Its totient is φ = 210485724960.

The previous prime is 315728587417. The next prime is 315728587453. The reversal of 315728587443 is 344785827513.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 315728587443 - 2¹⁰ = 315728586419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315728587453) 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, 52621431238 + ... + 52621431243.

It is an arithmetic number, because the mean of its divisors is an integer number (105242862482).

Almost surely, 2^315728587443 is an apocalyptic number.

315728587443 is a deficient number, since it is larger than the sum of its proper divisors (105242862485).

315728587443 is a wasteful number, since it uses less digits than its factorization.

315728587443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105242862484.

The product of its digits is 22579200, while the sum is 57.

The spelling of 315728587443 in words is "three hundred fifteen billion, seven hundred twenty-eight million, five hundred eighty-seven thousand, four hundred forty-three".