243133121 has 8 divisors (see below), whose sum is σ = 303127104. Its totient is φ = 189454320.

The previous prime is 243133097. The next prime is 243133147. The reversal of 243133121 is 121331342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243133121 - 2⁶ = 243133057 is a prime.

It is a super-2 number, since 2×243133121² = 118227429054401282, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 243133093 and 243133102.

It is not an unprimeable number, because it can be changed into a prime (243133421) 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 7 ways as a sum of consecutive naturals, for example, 1578710 + ... + 1578863.

It is an arithmetic number, because the mean of its divisors is an integer number (37890888).

Almost surely, 2^243133121 is an apocalyptic number.

It is an amenable number.

243133121 is a deficient number, since it is larger than the sum of its proper divisors (59993983).

243133121 is a wasteful number, since it uses less digits than its factorization.

243133121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3157591.

The product of its digits is 432, while the sum is 20.

The square root of 243133121 is about 15592.7265415642. The cubic root of 243133121 is about 624.1390778989.

Adding to 243133121 its reverse (121331342), we get a palindrome (364464463).

The spelling of 243133121 in words is "two hundred forty-three million, one hundred thirty-three thousand, one hundred twenty-one".