243140413 has 4 divisors (see below), whose sum is σ = 243230140. Its totient is φ = 243050688.

The previous prime is 243140411. The next prime is 243140419. The reversal of 243140413 is 314041342.

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 119530489 + 123609924 = 10933^2 + 11118^2 .

It is a cyclic number.

It is not a de Polignac number, because 243140413 - 2¹ = 243140411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243140411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40668 + ... + 46261.

It is an arithmetic number, because the mean of its divisors is an integer number (60807535).

Almost surely, 2^243140413 is an apocalyptic number.

It is an amenable number.

243140413 is a deficient number, since it is larger than the sum of its proper divisors (89727).

243140413 is an equidigital number, since it uses as much as digits as its factorization.

243140413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89726.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 243140413 is about 15592.9603667809. The cubic root of 243140413 is about 624.1453175213.

Adding to 243140413 its reverse (314041342), we get a palindrome (557181755).

The spelling of 243140413 in words is "two hundred forty-three million, one hundred forty thousand, four hundred thirteen".