243055401 has 4 divisors (see below), whose sum is σ = 324073872. Its totient is φ = 162036932.

The previous prime is 243055367. The next prime is 243055411. The reversal of 243055401 is 104550342.

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 243055401 - 2¹⁰ = 243054377 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243055411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40509231 + ... + 40509236.

It is an arithmetic number, because the mean of its divisors is an integer number (81018468).

Almost surely, 2^243055401 is an apocalyptic number.

It is an amenable number.

243055401 is a deficient number, since it is larger than the sum of its proper divisors (81018471).

243055401 is an equidigital number, since it uses as much as digits as its factorization.

243055401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81018470.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 243055401 is about 15590.2341547521. The cubic root of 243055401 is about 624.0725666552.

The spelling of 243055401 in words is "two hundred forty-three million, fifty-five thousand, four hundred one".