243205005 has 8 divisors (see below), whose sum is σ = 389128032. Its totient is φ = 129709328.

The previous prime is 243204961. The next prime is 243205019. The reversal of 243205005 is 500502342.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243205005 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8106819 + ... + 8106848.

It is an arithmetic number, because the mean of its divisors is an integer number (48641004).

Almost surely, 2^243205005 is an apocalyptic number.

It is an amenable number.

243205005 is a deficient number, since it is larger than the sum of its proper divisors (145923027).

243205005 is a wasteful number, since it uses less digits than its factorization.

243205005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16213675.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 243205005 is about 15595.0314202954. The cubic root of 243205005 is about 624.2005821925.

Adding to 243205005 its reverse (500502342), we get a palindrome (743707347).

The spelling of 243205005 in words is "two hundred forty-three million, two hundred five thousand, five".