243865149 has 16 divisors (see below), whose sum is σ = 356404224. Its totient is φ = 147092400.

The previous prime is 243865109. The next prime is 243865157. The reversal of 243865149 is 941568342.

243865149 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 243865149 - 2⁹ = 243864637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243865149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243865109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10549 + ... + 24474.

It is an arithmetic number, because the mean of its divisors is an integer number (22275264).

Almost surely, 2^243865149 is an apocalyptic number.

It is an amenable number.

243865149 is a deficient number, since it is larger than the sum of its proper divisors (112539075).

243865149 is a wasteful number, since it uses less digits than its factorization.

243865149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35248.

The product of its digits is 207360, while the sum is 42.

The square root of 243865149 is about 15616.1822799300. The cubic root of 243865149 is about 624.7648386764.

The spelling of 243865149 in words is "two hundred forty-three million, eight hundred sixty-five thousand, one hundred forty-nine".