243239506 has 8 divisors (see below), whose sum is σ = 368088444. Its totient is φ = 120543360.

The previous prime is 243239497. The next prime is 243239509. The reversal of 243239506 is 605932342.

It can be written as a sum of positive squares in 2 ways, for example, as 199798225 + 43441281 = 14135^2 + 6591^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (243239509) 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, 537915 + ... + 538366.

Almost surely, 2^243239506 is an apocalyptic number.

243239506 is a deficient number, since it is larger than the sum of its proper divisors (124848938).

243239506 is a wasteful number, since it uses less digits than its factorization.

243239506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076396.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 243239506 is about 15596.1375346590. The cubic root of 243239506 is about 624.2300971087.

The spelling of 243239506 in words is "two hundred forty-three million, two hundred thirty-nine thousand, five hundred six".