315243 has 6 divisors (see below), whose sum is σ = 455364. Its totient is φ = 210156.

The previous prime is 315223. The next prime is 315247. The reversal of 315243 is 342513.

It is not a de Polignac number, because 315243 - 2⁶ = 315179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (315247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17505 + ... + 17522.

It is an arithmetic number, because the mean of its divisors is an integer number (75894).

2³¹⁵²⁴³ is an apocalyptic number.

315243 is a deficient number, since it is larger than the sum of its proper divisors (140121).

315243 is a wasteful number, since it uses less digits than its factorization.

315243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35033 (or 35030 counting only the distinct ones).

The product of its digits is 360, while the sum is 18.

The square root of 315243 is about 561.4650478881. The cubic root of 315243 is about 68.0584128993.

Adding to 315243 its reverse (342513), we get a palindrome (657756).

The spelling of 315243 in words is "three hundred fifteen thousand, two hundred forty-three".