243120244255 has 32 divisors (see below), whose sum is σ = 343288471680. Its totient is φ = 161819105280.

The previous prime is 243120244249. The next prime is 243120244259. The reversal of 243120244255 is 552442021342.

It is not a de Polignac number, because 243120244255 - 2¹¹ = 243120242207 is a prime.

It is a super-2 number, since 2×243120244255² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243120244255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243120244259) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147310 + ... + 712699.

It is an arithmetic number, because the mean of its divisors is an integer number (10727764740).

Almost surely, 2^243120244255 is an apocalyptic number.

243120244255 is a deficient number, since it is larger than the sum of its proper divisors (100168227425).

243120244255 is a wasteful number, since it uses less digits than its factorization.

243120244255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860259.

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 243120244255 its reverse (552442021342), we get a palindrome (795562265597).

The spelling of 243120244255 in words is "two hundred forty-three billion, one hundred twenty million, two hundred forty-four thousand, two hundred fifty-five".