243351313123 has 2 divisors, whose sum is σ = 243351313124. Its totient is φ = 243351313122.

The previous prime is 243351313087. The next prime is 243351313147. The reversal of 243351313123 is 321313153342.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243351313123 is a prime.

It is not a weakly prime, because it can be changed into another prime (243351313223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121675656561 + 121675656562.

It is an arithmetic number, because the mean of its divisors is an integer number (121675656562).

Almost surely, 2^243351313123 is an apocalyptic number.

243351313123 is a deficient number, since it is larger than the sum of its proper divisors (1).

243351313123 is an equidigital number, since it uses as much as digits as its factorization.

243351313123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 31.

Adding to 243351313123 its reverse (321313153342), we get a palindrome (564664466465).

The spelling of 243351313123 in words is "two hundred forty-three billion, three hundred fifty-one million, three hundred thirteen thousand, one hundred twenty-three".