315112243 has 4 divisors (see below), whose sum is σ = 318652920. Its totient is φ = 311571568.

The previous prime is 315112211. The next prime is 315112267. The reversal of 315112243 is 342211513.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 315112243 - 2⁵ = 315112211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315112043) 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, 1770205 + ... + 1770382.

It is an arithmetic number, because the mean of its divisors is an integer number (79663230).

Almost surely, 2^315112243 is an apocalyptic number.

315112243 is a deficient number, since it is larger than the sum of its proper divisors (3540677).

315112243 is an equidigital number, since it uses as much as digits as its factorization.

315112243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3540676.

The product of its digits is 720, while the sum is 22.

The square root of 315112243 is about 17751.4011559651. The cubic root of 315112243 is about 680.4900180524.

Adding to 315112243 its reverse (342211513), we get a palindrome (657323756).

The spelling of 315112243 in words is "three hundred fifteen million, one hundred twelve thousand, two hundred forty-three".