243203342155 has 16 divisors (see below), whose sum is σ = 297003168000. Its totient is φ = 191127961440.

The previous prime is 243203342141. The next prime is 243203342203. The reversal of 243203342155 is 551243302342.

It is not a de Polignac number, because 243203342155 - 2¹⁹ = 243202817867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243203342155.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118060 + ... + 707350.

It is an arithmetic number, because the mean of its divisors is an integer number (18562698000).

Almost surely, 2^243203342155 is an apocalyptic number.

243203342155 is a deficient number, since it is larger than the sum of its proper divisors (53799825845).

243203342155 is a wasteful number, since it uses less digits than its factorization.

243203342155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590754.

The product of its (nonzero) digits is 86400, while the sum is 34.

Adding to 243203342155 its reverse (551243302342), we get a palindrome (794446644497).

The spelling of 243203342155 in words is "two hundred forty-three billion, two hundred three million, three hundred forty-two thousand, one hundred fifty-five".