243411421 has 4 divisors (see below), whose sum is σ = 265539744. Its totient is φ = 221283100.

The previous prime is 243411367. The next prime is 243411463. The reversal of 243411421 is 124114342.

It is a happy number.

243411421 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243411421 - 2¹¹ = 243409373 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243411392 and 243411401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243441421) 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, 11064145 + ... + 11064166.

It is an arithmetic number, because the mean of its divisors is an integer number (66384936).

Almost surely, 2^243411421 is an apocalyptic number.

It is an amenable number.

243411421 is a deficient number, since it is larger than the sum of its proper divisors (22128323).

243411421 is a wasteful number, since it uses less digits than its factorization.

243411421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22128322.

The product of its digits is 768, while the sum is 22.

The square root of 243411421 is about 15601.6480219238. The cubic root of 243411421 is about 624.3771253697.

Adding to 243411421 its reverse (124114342), we get a palindrome (367525763).

The spelling of 243411421 in words is "two hundred forty-three million, four hundred eleven thousand, four hundred twenty-one".