243125133 has 4 divisors (see below), whose sum is σ = 324166848. Its totient is φ = 162083420.

The previous prime is 243125123. The next prime is 243125137. The reversal of 243125133 is 331521342.

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 243125133 - 2⁵ = 243125101 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243125137) 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, 40520853 + ... + 40520858.

It is an arithmetic number, because the mean of its divisors is an integer number (81041712).

Almost surely, 2^243125133 is an apocalyptic number.

It is an amenable number.

243125133 is a deficient number, since it is larger than the sum of its proper divisors (81041715).

243125133 is an equidigital number, since it uses as much as digits as its factorization.

243125133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81041714.

The product of its digits is 2160, while the sum is 24.

The square root of 243125133 is about 15592.4703943923. The cubic root of 243125133 is about 624.1322425795.

Adding to 243125133 its reverse (331521342), we get a palindrome (574646475).

The spelling of 243125133 in words is "two hundred forty-three million, one hundred twenty-five thousand, one hundred thirty-three".