243315005393 has 2 divisors, whose sum is σ = 243315005394. Its totient is φ = 243315005392.

The previous prime is 243315005389. The next prime is 243315005413. The reversal of 243315005393 is 393500513342.

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., 129616560529 + 113698444864 = 360023^2 + 337192^2 .

It is a cyclic number.

It is not a de Polignac number, because 243315005393 - 2² = 243315005389 is a prime.

It is not a weakly prime, because it can be changed into another prime (243315005303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121657502696 + 121657502697.

It is an arithmetic number, because the mean of its divisors is an integer number (121657502697).

Almost surely, 2^243315005393 is an apocalyptic number.

It is an amenable number.

243315005393 is a deficient number, since it is larger than the sum of its proper divisors (1).

243315005393 is an equidigital number, since it uses as much as digits as its factorization.

243315005393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145800, while the sum is 38.

The spelling of 243315005393 in words is "two hundred forty-three billion, three hundred fifteen million, five thousand, three hundred ninety-three".