16521135133 has 8 divisors (see below), whose sum is σ = 17079896576. Its totient is φ = 15963987600.

The previous prime is 16521135119. The next prime is 16521135149. The reversal of 16521135133 is 33153112561.

16521135133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16521135133 - 2⁹ = 16521134621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16521135095 and 16521135104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16521133133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382641 + ... + 423622.

It is an arithmetic number, because the mean of its divisors is an integer number (2134987072).

Almost surely, 2^16521135133 is an apocalyptic number.

It is an amenable number.

16521135133 is a deficient number, since it is larger than the sum of its proper divisors (558761443).

16521135133 is an equidigital number, since it uses as much as digits as its factorization.

16521135133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806955.

The product of its digits is 8100, while the sum is 31.

Adding to 16521135133 its reverse (33153112561), we get a palindrome (49674247694).

The spelling of 16521135133 in words is "sixteen billion, five hundred twenty-one million, one hundred thirty-five thousand, one hundred thirty-three".