243400111003 has 4 divisors (see below), whose sum is σ = 278171555440. Its totient is φ = 208628666568.

The previous prime is 243400111001. The next prime is 243400111007. The reversal of 243400111003 is 300111004342.

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

It is not a de Polignac number, because 243400111003 - 2¹ = 243400111001 is a prime.

It is a super-2 number, since 2×243400111003² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243400111001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17385722208 + ... + 17385722221.

It is an arithmetic number, because the mean of its divisors is an integer number (69542888860).

Almost surely, 2^243400111003 is an apocalyptic number.

243400111003 is a deficient number, since it is larger than the sum of its proper divisors (34771444437).

243400111003 is an equidigital number, since it uses as much as digits as its factorization.

243400111003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34771444436.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 243400111003 its reverse (300111004342), we get a palindrome (543511115345).

The spelling of 243400111003 in words is "two hundred forty-three billion, four hundred million, one hundred eleven thousand, three".