318241243 has 2 divisors, whose sum is σ = 318241244. Its totient is φ = 318241242.

The previous prime is 318241213. The next prime is 318241247. The reversal of 318241243 is 342142813.

It is a strong prime.

It is an emirp because it is prime and its reverse (342142813) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318241243 is a prime.

It is not a weakly prime, because it can be changed into another prime (318241247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159120621 + 159120622.

It is an arithmetic number, because the mean of its divisors is an integer number (159120622).

Almost surely, 2^318241243 is an apocalyptic number.

318241243 is a deficient number, since it is larger than the sum of its proper divisors (1).

318241243 is an equidigital number, since it uses as much as digits as its factorization.

318241243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 28.

The square root of 318241243 is about 17839.3173355933. The cubic root of 318241243 is about 682.7349791778.

The spelling of 318241243 in words is "three hundred eighteen million, two hundred forty-one thousand, two hundred forty-three".