13240245523 has 2 divisors, whose sum is σ = 13240245524. Its totient is φ = 13240245522.

The previous prime is 13240245521. The next prime is 13240245547. The reversal of 13240245523 is 32554204231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13240245523 - 2¹ = 13240245521 is a prime.

Together with 13240245521, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13240245521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6620122761 + 6620122762.

It is an arithmetic number, because the mean of its divisors is an integer number (6620122762).

Almost surely, 2^13240245523 is an apocalyptic number.

13240245523 is a deficient number, since it is larger than the sum of its proper divisors (1).

13240245523 is an equidigital number, since it uses as much as digits as its factorization.

13240245523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 13240245523 its reverse (32554204231), we get a palindrome (45794449754).

The spelling of 13240245523 in words is "thirteen billion, two hundred forty million, two hundred forty-five thousand, five hundred twenty-three".