243163313 has 2 divisors, whose sum is σ = 243163314. Its totient is φ = 243163312.

The previous prime is 243163309. The next prime is 243163321. The reversal of 243163313 is 313361342.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213656689 + 29506624 = 14617^2 + 5432^2 .

It is a cyclic number.

It is not a de Polignac number, because 243163313 - 2² = 243163309 is a prime.

It is not a weakly prime, because it can be changed into another prime (243163513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121581656 + 121581657.

It is an arithmetic number, because the mean of its divisors is an integer number (121581657).

Almost surely, 2^243163313 is an apocalyptic number.

It is an amenable number.

243163313 is a deficient number, since it is larger than the sum of its proper divisors (1).

243163313 is an equidigital number, since it uses as much as digits as its factorization.

243163313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 26.

The square root of 243163313 is about 15593.6946552124. The cubic root of 243163313 is about 624.1649117946.

The spelling of 243163313 in words is "two hundred forty-three million, one hundred sixty-three thousand, three hundred thirteen".