243140343 has 4 divisors (see below), whose sum is σ = 324187128. Its totient is φ = 162093560.

The previous prime is 243140333. The next prime is 243140363. The reversal of 243140343 is 343041342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243140343 - 2⁶ = 243140279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243140333) 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, 40523388 + ... + 40523393.

It is an arithmetic number, because the mean of its divisors is an integer number (81046782).

Almost surely, 2^243140343 is an apocalyptic number.

243140343 is a deficient number, since it is larger than the sum of its proper divisors (81046785).

243140343 is an equidigital number, since it uses as much as digits as its factorization.

243140343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81046784.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 243140343 is about 15592.9581221781. The cubic root of 243140343 is about 624.1452576243.

Adding to 243140343 its reverse (343041342), we get a palindrome (586181685).

Subtracting 243140343 from its reverse (343041342), we obtain a palindrome (99900999).

The spelling of 243140343 in words is "two hundred forty-three million, one hundred forty thousand, three hundred forty-three".