240343143 has 4 divisors (see below), whose sum is σ = 320457528. Its totient is φ = 160228760.

The previous prime is 240343139. The next prime is 240343151. The reversal of 240343143 is 341343042.

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 240343143 - 2² = 240343139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240343153) 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, 40057188 + ... + 40057193.

It is an arithmetic number, because the mean of its divisors is an integer number (80114382).

Almost surely, 2^240343143 is an apocalyptic number.

240343143 is a deficient number, since it is larger than the sum of its proper divisors (80114385).

240343143 is an equidigital number, since it uses as much as digits as its factorization.

240343143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80114384.

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

The square root of 240343143 is about 15503.0043217436. The cubic root of 240343143 is about 621.7425337845.

Adding to 240343143 its reverse (341343042), we get a palindrome (581686185).

The spelling of 240343143 in words is "two hundred forty million, three hundred forty-three thousand, one hundred forty-three".