242140402313 has 2 divisors, whose sum is σ = 242140402314. Its totient is φ = 242140402312.

The previous prime is 242140402297. The next prime is 242140402397. The reversal of 242140402313 is 313204041242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187313243209 + 54827159104 = 432797^2 + 234152^2 .

It is a cyclic number.

It is not a de Polignac number, because 242140402313 - 2⁴ = 242140402297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (242140401313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121070201156 + 121070201157.

It is an arithmetic number, because the mean of its divisors is an integer number (121070201157).

Almost surely, 2^242140402313 is an apocalyptic number.

It is an amenable number.

242140402313 is a deficient number, since it is larger than the sum of its proper divisors (1).

242140402313 is an equidigital number, since it uses as much as digits as its factorization.

242140402313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 242140402313 its reverse (313204041242), we get a palindrome (555344443555).

The spelling of 242140402313 in words is "two hundred forty-two billion, one hundred forty million, four hundred two thousand, three hundred thirteen".