243044020133 has 4 divisors (see below), whose sum is σ = 243045947520. Its totient is φ = 243042092748.

The previous prime is 243044020129. The next prime is 243044020157. The reversal of 243044020133 is 331020440342.

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 243044020133 - 2² = 243044020129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243044020333) 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, 760223 + ... + 1031516.

It is an arithmetic number, because the mean of its divisors is an integer number (60761486880).

Almost surely, 2^243044020133 is an apocalyptic number.

It is an amenable number.

243044020133 is a deficient number, since it is larger than the sum of its proper divisors (1927387).

243044020133 is a wasteful number, since it uses less digits than its factorization.

243044020133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927386.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 243044020133 its reverse (331020440342), we get a palindrome (574064460475).

The spelling of 243044020133 in words is "two hundred forty-three billion, forty-four million, twenty thousand, one hundred thirty-three".