315128343 has 4 divisors (see below), whose sum is σ = 420171128. Its totient is φ = 210085560.

The previous prime is 315128339. The next prime is 315128347. The reversal of 315128343 is 343821513.

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

It is an interprime number because it is at equal distance from previous prime (315128339) and next prime (315128347).

It is not a de Polignac number, because 315128343 - 2² = 315128339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 315128343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315128347) 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, 52521388 + ... + 52521393.

It is an arithmetic number, because the mean of its divisors is an integer number (105042782).

Almost surely, 2^315128343 is an apocalyptic number.

315128343 is a deficient number, since it is larger than the sum of its proper divisors (105042785).

315128343 is a wasteful number, since it uses less digits than its factorization.

315128343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105042784.

The product of its digits is 8640, while the sum is 30.

The square root of 315128343 is about 17751.8546355022. The cubic root of 315128343 is about 680.5016072590.

Adding to 315128343 its reverse (343821513), we get a palindrome (658949856).

The spelling of 315128343 in words is "three hundred fifteen million, one hundred twenty-eight thousand, three hundred forty-three".