240440243 has 2 divisors, whose sum is σ = 240440244. Its totient is φ = 240440242.

The previous prime is 240440227. The next prime is 240440261. The reversal of 240440243 is 342044042.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 240440243 - 2⁴ = 240440227 is a prime.

It is not a weakly prime, because it can be changed into another prime (240443243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120220121 + 120220122.

It is an arithmetic number, because the mean of its divisors is an integer number (120220122).

Almost surely, 2^240440243 is an apocalyptic number.

240440243 is a deficient number, since it is larger than the sum of its proper divisors (1).

240440243 is an equidigital number, since it uses as much as digits as its factorization.

240440243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 240440243 is about 15506.1356565716. The cubic root of 240440243 is about 621.8262516875.

Adding to 240440243 its reverse (342044042), we get a palindrome (582484285).

The spelling of 240440243 in words is "two hundred forty million, four hundred forty thousand, two hundred forty-three".