135633521 has 8 divisors (see below), whose sum is σ = 137380320. Its totient is φ = 133895808.

The previous prime is 135633517. The next prime is 135633529. The reversal of 135633521 is 125336531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135633521 - 2² = 135633517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135633529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30785 + ... + 34913.

It is an arithmetic number, because the mean of its divisors is an integer number (17172540).

Almost surely, 2^135633521 is an apocalyptic number.

It is an amenable number.

135633521 is a deficient number, since it is larger than the sum of its proper divisors (1746799).

135633521 is a wasteful number, since it uses less digits than its factorization.

135633521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4543.

The product of its digits is 8100, while the sum is 29.

The square root of 135633521 is about 11646.1805326897. The cubic root of 135633521 is about 513.7939806812.

The spelling of 135633521 in words is "one hundred thirty-five million, six hundred thirty-three thousand, five hundred twenty-one".