243432445 has 8 divisors (see below), whose sum is σ = 297630936. Its totient is φ = 191071296.

The previous prime is 243432421. The next prime is 243432463. The reversal of 243432445 is 544234342.

It can be written as a sum of positive squares in 4 ways, for example, as 106378596 + 137053849 = 10314^2 + 11707^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243432445 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459042 + ... + 459571.

It is an arithmetic number, because the mean of its divisors is an integer number (37203867).

Almost surely, 2^243432445 is an apocalyptic number.

It is an amenable number.

243432445 is a deficient number, since it is larger than the sum of its proper divisors (54198491).

243432445 is an equidigital number, since it uses as much as digits as its factorization.

243432445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918671.

The product of its digits is 46080, while the sum is 31.

The square root of 243432445 is about 15602.3217823502. The cubic root of 243432445 is about 624.3951011447.

Adding to 243432445 its reverse (544234342), we get a palindrome (787666787).

The spelling of 243432445 in words is "two hundred forty-three million, four hundred thirty-two thousand, four hundred forty-five".