13135523 has 2 divisors, whose sum is σ = 13135524. Its totient is φ = 13135522.

The previous prime is 13135519. The next prime is 13135541. The reversal of 13135523 is 32553131.

13135523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13135523 - 2² = 13135519 is a prime.

It is not a weakly prime, because it can be changed into another prime (13135823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6567761 + 6567762.

It is an arithmetic number, because the mean of its divisors is an integer number (6567762).

Almost surely, 2^13135523 is an apocalyptic number.

13135523 is a deficient number, since it is larger than the sum of its proper divisors (1).

13135523 is an equidigital number, since it uses as much as digits as its factorization.

13135523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1350, while the sum is 23.

The square root of 13135523 is about 3624.2962075415. The cubic root of 13135523 is about 235.9477225488.

Adding to 13135523 its reverse (32553131), we get a palindrome (45688654).

The spelling of 13135523 in words is "thirteen million, one hundred thirty-five thousand, five hundred twenty-three".