243078145 has 24 divisors (see below), whose sum is σ = 315541800. Its totient is φ = 179536896.

The previous prime is 243078131. The next prime is 243078149. The reversal of 243078145 is 541870342.

It can be written as a sum of positive squares in 4 ways, for example, as 58308496 + 184769649 = 7636^2 + 13593^2 .

It is not a de Polignac number, because 243078145 - 2⁹ = 243077633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243078145.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243078149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75121 + ... + 78289.

It is an arithmetic number, because the mean of its divisors is an integer number (13147575).

Almost surely, 2^243078145 is an apocalyptic number.

It is an amenable number.

243078145 is a deficient number, since it is larger than the sum of its proper divisors (72463655).

243078145 is a wasteful number, since it uses less digits than its factorization.

243078145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3249 (or 3226 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 243078145 is about 15590.9635686830. The cubic root of 243078145 is about 624.0920319893.

The spelling of 243078145 in words is "two hundred forty-three million, seventy-eight thousand, one hundred forty-five".