135523533 has 4 divisors (see below), whose sum is σ = 180698048. Its totient is φ = 90349020.

The previous prime is 135523511. The next prime is 135523543. The reversal of 135523533 is 335325531.

135523533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 335325531 = 3 ⋅111775177.

It is not a de Polignac number, because 135523533 - 2⁶ = 135523469 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 135523533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135523543) 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, 22587253 + ... + 22587258.

It is an arithmetic number, because the mean of its divisors is an integer number (45174512).

Almost surely, 2^135523533 is an apocalyptic number.

It is an amenable number.

135523533 is a deficient number, since it is larger than the sum of its proper divisors (45174515).

135523533 is an equidigital number, since it uses as much as digits as its factorization.

135523533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45174514.

The product of its digits is 20250, while the sum is 30.

The square root of 135523533 is about 11641.4575118410. The cubic root of 135523533 is about 513.6550611030.

The spelling of 135523533 in words is "one hundred thirty-five million, five hundred twenty-three thousand, five hundred thirty-three".