243101155 has 32 divisors (see below), whose sum is σ = 327628800. Its totient is φ = 171649920.

The previous prime is 243101149. The next prime is 243101179. The reversal of 243101155 is 551101342.

It is a happy number.

It is not a de Polignac number, because 243101155 - 2²³ = 234712547 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 405546 + ... + 406144.

It is an arithmetic number, because the mean of its divisors is an integer number (10238400).

Almost surely, 2^243101155 is an apocalyptic number.

243101155 is a deficient number, since it is larger than the sum of its proper divisors (84527645).

243101155 is a wasteful number, since it uses less digits than its factorization.

243101155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 243101155 is about 15591.7014786713. The cubic root of 243101155 is about 624.1117237425. Note that the first 3 decimals are identical.

Adding to 243101155 its reverse (551101342), we get a palindrome (794202497).

The spelling of 243101155 in words is "two hundred forty-three million, one hundred one thousand, one hundred fifty-five".