243120100033 has 4 divisors (see below), whose sum is σ = 244668635860. Its totient is φ = 241571564208.

The previous prime is 243120099991. The next prime is 243120100039. The reversal of 243120100033 is 330001021342.

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

It can be written as a sum of positive squares in 2 ways, for example, as 92457348624 + 150662751409 = 304068^2 + 388153^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243120100033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243120100039) 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, 774267678 + ... + 774267991.

It is an arithmetic number, because the mean of its divisors is an integer number (61167158965).

Almost surely, 2^243120100033 is an apocalyptic number.

It is an amenable number.

243120100033 is a deficient number, since it is larger than the sum of its proper divisors (1548535827).

243120100033 is a wasteful number, since it uses less digits than its factorization.

243120100033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548535826.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 243120100033 its reverse (330001021342), we get a palindrome (573121121375).

The spelling of 243120100033 in words is "two hundred forty-three billion, one hundred twenty million, one hundred thousand, thirty-three".