243240501133 has 4 divisors (see below), whose sum is σ = 277989144160. Its totient is φ = 208491858108.

The previous prime is 243240501113. The next prime is 243240501143. The reversal of 243240501133 is 331105042342.

It is a happy number.

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: 331105042342 = 2 ⋅165552521171.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243240501133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243240501113) 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, 17374321503 + ... + 17374321516.

It is an arithmetic number, because the mean of its divisors is an integer number (69497286040).

Almost surely, 2^243240501133 is an apocalyptic number.

It is an amenable number.

243240501133 is a deficient number, since it is larger than the sum of its proper divisors (34748643027).

243240501133 is an equidigital number, since it uses as much as digits as its factorization.

243240501133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34748643026.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 243240501133 its reverse (331105042342), we get a palindrome (574345543475).

The spelling of 243240501133 in words is "two hundred forty-three billion, two hundred forty million, five hundred one thousand, one hundred thirty-three".