243243001 has 4 divisors (see below), whose sum is σ = 248418432. Its totient is φ = 238067572.

The previous prime is 243242999. The next prime is 243243043. The reversal of 243243001 is 100342342.

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, and also an emirpimes, since its reverse is a distinct semiprime: 100342342 = 2 ⋅50171171.

It is a cyclic number.

It is not a de Polignac number, because 243243001 - 2¹ = 243242999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243243001.

It is not an unprimeable number, because it can be changed into a prime (243243061) 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, 2587645 + ... + 2587738.

It is an arithmetic number, because the mean of its divisors is an integer number (62104608).

Almost surely, 2^243243001 is an apocalyptic number.

It is an amenable number.

243243001 is a deficient number, since it is larger than the sum of its proper divisors (5175431).

243243001 is an equidigital number, since it uses as much as digits as its factorization.

243243001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5175430.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 243243001 is about 15596.2495812295. The cubic root of 243243001 is about 624.2330868557.

Adding to 243243001 its reverse (100342342), we get a palindrome (343585343).

The spelling of 243243001 in words is "two hundred forty-three million, two hundred forty-three thousand, one".