243155055139 has 32 divisors (see below), whose sum is σ = 267821568000. Its totient is φ = 219924129024.

The previous prime is 243155055131. The next prime is 243155055193. The reversal of 243155055139 is 931550551342.

243155055139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 243155055139 - 2³ = 243155055131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243155055095 and 243155055104.

It is not an unprimeable number, because it can be changed into a prime (243155055131) by changing a digit.

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, 23595262 + ... + 23605564.

It is an arithmetic number, because the mean of its divisors is an integer number (8369424000).

Almost surely, 2^243155055139 is an apocalyptic number.

243155055139 is a deficient number, since it is larger than the sum of its proper divisors (24666512861).

243155055139 is a wasteful number, since it uses less digits than its factorization.

243155055139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10987.

The product of its (nonzero) digits is 405000, while the sum is 43.

The spelling of 243155055139 in words is "two hundred forty-three billion, one hundred fifty-five million, fifty-five thousand, one hundred thirty-nine".