243142205 has 8 divisors (see below), whose sum is σ = 291866112. Its totient is φ = 194450128.

The previous prime is 243142201. The next prime is 243142243. The reversal of 243142205 is 502241342.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 243142205 - 2² = 243142201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243142201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14744 + ... + 26526.

It is an arithmetic number, because the mean of its divisors is an integer number (36483264).

Almost surely, 2^243142205 is an apocalyptic number.

It is an amenable number.

243142205 is a deficient number, since it is larger than the sum of its proper divisors (48723907).

243142205 is a wasteful number, since it uses less digits than its factorization.

243142205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15915.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 243142205 is about 15593.0178285026. The cubic root of 243142205 is about 624.1468508818.

Adding to 243142205 its reverse (502241342), we get a palindrome (745383547).

The spelling of 243142205 in words is "two hundred forty-three million, one hundred forty-two thousand, two hundred five".