243421235 has 4 divisors (see below), whose sum is σ = 292105488. Its totient is φ = 194736984.

The previous prime is 243421193. The next prime is 243421247. The reversal of 243421235 is 532124342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 532124342 = 2 ⋅266062171.

It is a cyclic number.

It is not a de Polignac number, because 243421235 - 2¹⁰ = 243420211 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24342119 + ... + 24342128.

It is an arithmetic number, because the mean of its divisors is an integer number (73026372).

Almost surely, 2^243421235 is an apocalyptic number.

243421235 is a deficient number, since it is larger than the sum of its proper divisors (48684253).

243421235 is an equidigital number, since it uses as much as digits as its factorization.

243421235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48684252.

The product of its digits is 5760, while the sum is 26.

The square root of 243421235 is about 15601.9625368093. The cubic root of 243421235 is about 624.3855165875.

Adding to 243421235 its reverse (532124342), we get a palindrome (775545577).

The spelling of 243421235 in words is "two hundred forty-three million, four hundred twenty-one thousand, two hundred thirty-five".