135616523 has 4 divisors (see below), whose sum is σ = 154990320. Its totient is φ = 116242728.

The previous prime is 135616513. The next prime is 135616529. The reversal of 135616523 is 325616531.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 135616523 - 2²² = 131422219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135616523.

It is not an unprimeable number, because it can be changed into a prime (135616529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9686888 + ... + 9686901.

It is an arithmetic number, because the mean of its divisors is an integer number (38747580).

Almost surely, 2^135616523 is an apocalyptic number.

135616523 is a deficient number, since it is larger than the sum of its proper divisors (19373797).

135616523 is an equidigital number, since it uses as much as digits as its factorization.

135616523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19373796.

The product of its digits is 16200, while the sum is 32.

The square root of 135616523 is about 11645.4507426720. The cubic root of 135616523 is about 513.7725163832.

The spelling of 135616523 in words is "one hundred thirty-five million, six hundred sixteen thousand, five hundred twenty-three".