5533135221 has 4 divisors (see below), whose sum is σ = 7377513632. Its totient is φ = 3688756812.

The previous prime is 5533135211. The next prime is 5533135253. The reversal of 5533135221 is 1225313355.

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.

It is not a de Polignac number, because 5533135221 - 2⁵ = 5533135189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5533135211) 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, 922189201 + ... + 922189206.

It is an arithmetic number, because the mean of its divisors is an integer number (1844378408).

Almost surely, 2^5533135221 is an apocalyptic number.

It is an amenable number.

5533135221 is a deficient number, since it is larger than the sum of its proper divisors (1844378411).

5533135221 is a wasteful number, since it uses less digits than its factorization.

5533135221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1844378410.

The product of its digits is 13500, while the sum is 30.

The square root of 5533135221 is about 74385.0470255951. The cubic root of 5533135221 is about 1768.7118870269.

Adding to 5533135221 its reverse (1225313355), we get a palindrome (6758448576).

The spelling of 5533135221 in words is "five billion, five hundred thirty-three million, one hundred thirty-five thousand, two hundred twenty-one".