243133441 has 4 divisors (see below), whose sum is σ = 243264852. Its totient is φ = 243002032.

The previous prime is 243133433. The next prime is 243133447. The reversal of 243133441 is 144331342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 144331342 = 2 ⋅72165671.

It can be written as a sum of positive squares in 2 ways, for example, as 200505600 + 42627841 = 14160^2 + 6529^2 .

It is a cyclic number.

It is not a de Polignac number, because 243133441 - 2³ = 243133433 is a prime.

It is a super-2 number, since 2×243133441² = 118227740265000962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243133447) 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, 62890 + ... + 66643.

It is an arithmetic number, because the mean of its divisors is an integer number (60816213).

Almost surely, 2^243133441 is an apocalyptic number.

It is an amenable number.

243133441 is a deficient number, since it is larger than the sum of its proper divisors (131411).

243133441 is a wasteful number, since it uses less digits than its factorization.

243133441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131410.

The product of its digits is 3456, while the sum is 25.

The square root of 243133441 is about 15592.7368027553. The cubic root of 243133441 is about 624.1393517193.

Adding to 243133441 its reverse (144331342), we get a palindrome (387464783).

The spelling of 243133441 in words is "two hundred forty-three million, one hundred thirty-three thousand, four hundred forty-one".