243524489 has 4 divisors (see below), whose sum is σ = 262257156. Its totient is φ = 224791824.

The previous prime is 243524443. The next prime is 243524497. The reversal of 243524489 is 984425342.

243524489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35010889 + 208513600 = 5917^2 + 14440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243524489 is a prime.

It is a super-2 number, since 2×243524489² = 118608353485422242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243524429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9366314 + ... + 9366339.

It is an arithmetic number, because the mean of its divisors is an integer number (65564289).

Almost surely, 2^243524489 is an apocalyptic number.

It is an amenable number.

243524489 is a deficient number, since it is larger than the sum of its proper divisors (18732667).

243524489 is a wasteful number, since it uses less digits than its factorization.

243524489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18732666.

The product of its digits is 276480, while the sum is 41.

The square root of 243524489 is about 15605.2711927733. The cubic root of 243524489 is about 624.4737876987.

The spelling of 243524489 in words is "two hundred forty-three million, five hundred twenty-four thousand, four hundred eighty-nine".