243242315 has 4 divisors (see below), whose sum is σ = 291890784. Its totient is φ = 194593848.

The previous prime is 243242269. The next prime is 243242323. The reversal of 243242315 is 513242342.

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 243242315 - 2²² = 239048011 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24324227 + ... + 24324236.

It is an arithmetic number, because the mean of its divisors is an integer number (72972696).

Almost surely, 2^243242315 is an apocalyptic number.

243242315 is a deficient number, since it is larger than the sum of its proper divisors (48648469).

243242315 is an equidigital number, since it uses as much as digits as its factorization.

243242315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48648468.

The product of its digits is 5760, while the sum is 26.

The square root of 243242315 is about 15596.2275887472. The cubic root of 243242315 is about 624.2325000292.

Adding to 243242315 its reverse (513242342), we get a palindrome (756484657).

The spelling of 243242315 in words is "two hundred forty-three million, two hundred forty-two thousand, three hundred fifteen".