243485316523 has 2 divisors, whose sum is σ = 243485316524. Its totient is φ = 243485316522.

The previous prime is 243485316517. The next prime is 243485316527. The reversal of 243485316523 is 325613584342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243485316523 is a prime.

It is not a weakly prime, because it can be changed into another prime (243485316527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121742658261 + 121742658262.

It is an arithmetic number, because the mean of its divisors is an integer number (121742658262).

Almost surely, 2^243485316523 is an apocalyptic number.

243485316523 is a deficient number, since it is larger than the sum of its proper divisors (1).

243485316523 is an equidigital number, since it uses as much as digits as its factorization.

243485316523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2073600, while the sum is 46.

The spelling of 243485316523 in words is "two hundred forty-three billion, four hundred eighty-five million, three hundred sixteen thousand, five hundred twenty-three".