243404031 has 8 divisors (see below), whose sum is σ = 349503280. Its totient is φ = 149787072.

The previous prime is 243404027. The next prime is 243404039. The reversal of 243404031 is 130404342.

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

It is not a de Polignac number, because 243404031 - 2² = 243404027 is a prime.

It is a super-2 number, since 2×243404031² = 118491044614097922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243403989 and 243404007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243404039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3120526 + ... + 3120603.

It is an arithmetic number, because the mean of its divisors is an integer number (43687910).

Almost surely, 2^243404031 is an apocalyptic number.

243404031 is a deficient number, since it is larger than the sum of its proper divisors (106099249).

243404031 is a wasteful number, since it uses less digits than its factorization.

243404031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6241145.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 243404031 is about 15601.4111861716. The cubic root of 243404031 is about 624.3708065843.

Adding to 243404031 its reverse (130404342), we get a palindrome (373808373).

The spelling of 243404031 in words is "two hundred forty-three million, four hundred four thousand, thirty-one".