243041401 has 4 divisors (see below), whose sum is σ = 257337972. Its totient is φ = 228744832.

The previous prime is 243041387. The next prime is 243041441. The reversal of 243041401 is 104140342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104140342 = 2 ⋅52070171.

It can be written as a sum of positive squares in 2 ways, for example, as 166023225 + 77018176 = 12885^2 + 8776^2 .

It is a cyclic number.

It is not a de Polignac number, because 243041401 - 2¹¹ = 243039353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243041441) 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, 7148260 + ... + 7148293.

It is an arithmetic number, because the mean of its divisors is an integer number (64334493).

Almost surely, 2^243041401 is an apocalyptic number.

It is an amenable number.

243041401 is a deficient number, since it is larger than the sum of its proper divisors (14296571).

243041401 is a wasteful number, since it uses less digits than its factorization.

243041401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14296570.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 243041401 is about 15589.7851492572. The cubic root of 243041401 is about 624.0605842242.

Adding to 243041401 its reverse (104140342), we get a palindrome (347181743).

The spelling of 243041401 in words is "two hundred forty-three million, forty-one thousand, four hundred one".