243240401003 has 4 divisors (see below), whose sum is σ = 246171008328. Its totient is φ = 240309793680.

The previous prime is 243240400979. The next prime is 243240401029. The reversal of 243240401003 is 300104042342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243240401003 - 2⁶ = 243240400939 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 243240401003.

It is not an unprimeable number, because it can be changed into a prime (243240401093) 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, 1465303538 + ... + 1465303703.

It is an arithmetic number, because the mean of its divisors is an integer number (61542752082).

Almost surely, 2^243240401003 is an apocalyptic number.

243240401003 is a deficient number, since it is larger than the sum of its proper divisors (2930607325).

243240401003 is an equidigital number, since it uses as much as digits as its factorization.

243240401003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2930607324.

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

Adding to 243240401003 its reverse (300104042342), we get a palindrome (543344443345).

The spelling of 243240401003 in words is "two hundred forty-three billion, two hundred forty million, four hundred one thousand, three".