243347155 has 8 divisors (see below), whose sum is σ = 307386000. Its totient is φ = 184431456.

The previous prime is 243347123. The next prime is 243347201. The reversal of 243347155 is 551743342.

243347155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 243347155 - 2⁵ = 243347123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243347155.

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, 1280680 + ... + 1280869.

It is an arithmetic number, because the mean of its divisors is an integer number (38423250).

Almost surely, 2^243347155 is an apocalyptic number.

243347155 is a deficient number, since it is larger than the sum of its proper divisors (64038845).

243347155 is a wasteful number, since it uses less digits than its factorization.

243347155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561573.

The product of its digits is 50400, while the sum is 34.

The square root of 243347155 is about 15599.5882958493. The cubic root of 243347155 is about 624.3221707417.

The spelling of 243347155 in words is "two hundred forty-three million, three hundred forty-seven thousand, one hundred fifty-five".