13534332321 has 4 divisors (see below), whose sum is σ = 18045776432. Its totient is φ = 9022888212.

The previous prime is 13534332233. The next prime is 13534332353. The reversal of 13534332321 is 12323343531.

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 13534332321 - 2⁷ = 13534332193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13534332821) 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, 2255722051 + ... + 2255722056.

It is an arithmetic number, because the mean of its divisors is an integer number (4511444108).

Almost surely, 2^13534332321 is an apocalyptic number.

It is an amenable number.

13534332321 is a deficient number, since it is larger than the sum of its proper divisors (4511444111).

13534332321 is an equidigital number, since it uses as much as digits as its factorization.

13534332321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4511444110.

The product of its digits is 19440, while the sum is 30.

Adding to 13534332321 its reverse (12323343531), we get a palindrome (25857675852).

The spelling of 13534332321 in words is "thirteen billion, five hundred thirty-four million, three hundred thirty-two thousand, three hundred twenty-one".