243155011255 has 8 divisors (see below), whose sum is σ = 314231091552. Its totient is φ = 179560623648.

The previous prime is 243155011241. The next prime is 243155011261. The reversal of 243155011255 is 552110551342.

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 243155011255 - 2⁹ = 243155010743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243155011255.

It is a congruent number.

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, 1870423099 + ... + 1870423228.

It is an arithmetic number, because the mean of its divisors is an integer number (39278886444).

Almost surely, 2^243155011255 is an apocalyptic number.

243155011255 is a deficient number, since it is larger than the sum of its proper divisors (71076080297).

243155011255 is a wasteful number, since it uses less digits than its factorization.

243155011255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3740846345.

The product of its (nonzero) digits is 30000, while the sum is 34.

Adding to 243155011255 its reverse (552110551342), we get a palindrome (795265562597).

The spelling of 243155011255 in words is "two hundred forty-three billion, one hundred fifty-five million, eleven thousand, two hundred fifty-five".