13453530221 has 4 divisors (see below), whose sum is σ = 13523967744. Its totient is φ = 13383092700.

The previous prime is 13453530199. The next prime is 13453530263. The reversal of 13453530221 is 12203535431.

It is a happy number.

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 13453530221 - 2¹⁰ = 13453529197 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 (13453530281) 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, 35218475 + ... + 35218856.

It is an arithmetic number, because the mean of its divisors is an integer number (3380991936).

Almost surely, 2^13453530221 is an apocalyptic number.

It is an amenable number.

13453530221 is a deficient number, since it is larger than the sum of its proper divisors (70437523).

13453530221 is an equidigital number, since it uses as much as digits as its factorization.

13453530221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70437522.

The product of its (nonzero) digits is 10800, while the sum is 29.

The spelling of 13453530221 in words is "thirteen billion, four hundred fifty-three million, five hundred thirty thousand, two hundred twenty-one".