13531053221 has 4 divisors (see below), whose sum is σ = 15464060832. Its totient is φ = 11598045612.

The previous prime is 13531053199. The next prime is 13531053229. The reversal of 13531053221 is 12235013531.

13531053221 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.

It is a cyclic number.

It is not a de Polignac number, because 13531053221 - 2¹⁸ = 13530791077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531053229) 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 3 ways as a sum of consecutive naturals, for example, 966503795 + ... + 966503808.

It is an arithmetic number, because the mean of its divisors is an integer number (3866015208).

Almost surely, 2^13531053221 is an apocalyptic number.

It is an amenable number.

13531053221 is a deficient number, since it is larger than the sum of its proper divisors (1933007611).

13531053221 is an equidigital number, since it uses as much as digits as its factorization.

13531053221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1933007610.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 13531053221 its reverse (12235013531), we get a palindrome (25766066752).

The spelling of 13531053221 in words is "thirteen billion, five hundred thirty-one million, fifty-three thousand, two hundred twenty-one".