243666135 has 12 divisors (see below), whose sum is σ = 422354712. Its totient is φ = 129955248.

The previous prime is 243666103. The next prime is 243666139. The reversal of 243666135 is 531666342.

243666135 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243666135 - 2⁵ = 243666103 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 243666135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243666139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2707357 + ... + 2707446.

It is an arithmetic number, because the mean of its divisors is an integer number (35196226).

Almost surely, 2^243666135 is an apocalyptic number.

243666135 is a deficient number, since it is larger than the sum of its proper divisors (178688577).

243666135 is a wasteful number, since it uses less digits than its factorization.

243666135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5414814 (or 5414811 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 243666135 is about 15609.8089354098. The cubic root of 243666135 is about 624.5948392751.

The spelling of 243666135 in words is "two hundred forty-three million, six hundred sixty-six thousand, one hundred thirty-five".