243252155 has 8 divisors (see below), whose sum is σ = 307266000. Its totient is φ = 184359456.

The previous prime is 243252083. The next prime is 243252157. The reversal of 243252155 is 551252342.

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 243252155 - 2²⁰ = 242203579 is a prime.

It is a super-2 number, since 2×243252155² = 118343221824288050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243252157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1280180 + ... + 1280369.

It is an arithmetic number, because the mean of its divisors is an integer number (38408250).

Almost surely, 2^243252155 is an apocalyptic number.

243252155 is a deficient number, since it is larger than the sum of its proper divisors (64013845).

243252155 is a wasteful number, since it uses less digits than its factorization.

243252155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560573.

The product of its digits is 12000, while the sum is 29.

The square root of 243252155 is about 15596.5430464574. The cubic root of 243252155 is about 624.2409173763.

The spelling of 243252155 in words is "two hundred forty-three million, two hundred fifty-two thousand, one hundred fifty-five".