135503523 has 20 divisors (see below), whose sum is σ = 203198688. Its totient is φ = 89987760.

The previous prime is 135503521. The next prime is 135503527. The reversal of 135503523 is 325305531.

135503523 is a `hidden beast` number, since 135 + 5 + 0 + 3 + 523 = 666.

It is not a de Polignac number, because 135503523 - 2¹ = 135503521 is a prime.

It is a super-2 number, since 2×135503523² = 36722409490823058, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (135503521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18865 + ... + 25037.

Almost surely, 2^135503523 is an apocalyptic number.

135503523 is a deficient number, since it is larger than the sum of its proper divisors (67695165).

135503523 is an equidigital number, since it uses as much as digits as its factorization.

135503523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6456 (or 6447 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 27.

The square root of 135503523 is about 11640.5980516467. The cubic root of 135503523 is about 513.6297795315.

The spelling of 135503523 in words is "one hundred thirty-five million, five hundred three thousand, five hundred twenty-three".