243041431 has 6 divisors (see below), whose sum is σ = 251712032. Its totient is φ = 234659880.

The previous prime is 243041387. The next prime is 243041441. The reversal of 243041431 is 134140342.

It is not a de Polignac number, because 243041431 - 2¹³ = 243033239 is a prime.

It is a super-2 number, since 2×243041431² = 118138274365055522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243041441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 143655 + ... + 145336.

Almost surely, 2^243041431 is an apocalyptic number.

243041431 is a deficient number, since it is larger than the sum of its proper divisors (8670601).

243041431 is an equidigital number, since it uses as much as digits as its factorization.

243041431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289049 (or 289020 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 243041431 is about 15589.7861114256. The cubic root of 243041431 is about 624.0606099014.

Adding to 243041431 its reverse (134140342), we get a palindrome (377181773).

The spelling of 243041431 in words is "two hundred forty-three million, forty-one thousand, four hundred thirty-one".