243234401 has 4 divisors (see below), whose sum is σ = 251080704. Its totient is φ = 235388100.

The previous prime is 243234391. The next prime is 243234449. The reversal of 243234401 is 104432342.

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 a de Polignac number, because none of the positive numbers 2^k-243234401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243234451) 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, 3923105 + ... + 3923166.

It is an arithmetic number, because the mean of its divisors is an integer number (62770176).

Almost surely, 2^243234401 is an apocalyptic number.

It is an amenable number.

243234401 is a deficient number, since it is larger than the sum of its proper divisors (7846303).

243234401 is an equidigital number, since it uses as much as digits as its factorization.

243234401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7846302.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 243234401 is about 15595.9738714836. The cubic root of 243234401 is about 624.2257300591.

Adding to 243234401 its reverse (104432342), we get a palindrome (347666743).

The spelling of 243234401 in words is "two hundred forty-three million, two hundred thirty-four thousand, four hundred one".