13552231321 has 4 divisors (see below), whose sum is σ = 13552507444. Its totient is φ = 13551955200.

The previous prime is 13552231291. The next prime is 13552231333. The reversal of 13552231321 is 12313225531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11449000000 + 2103231321 = 107000^2 + 45861^2 .

It is a cyclic number.

It is not a de Polignac number, because 13552231321 - 2¹⁵ = 13552198553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13552231321.

It is not an unprimeable number, because it can be changed into a prime (13552231421) 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, 42300 + ... + 169981.

It is an arithmetic number, because the mean of its divisors is an integer number (3388126861).

Almost surely, 2^13552231321 is an apocalyptic number.

It is an amenable number.

13552231321 is a deficient number, since it is larger than the sum of its proper divisors (276123).

13552231321 is an equidigital number, since it uses as much as digits as its factorization.

13552231321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276122.

The product of its digits is 5400, while the sum is 28.

Adding to 13552231321 its reverse (12313225531), we get a palindrome (25865456852).

The spelling of 13552231321 in words is "thirteen billion, five hundred fifty-two million, two hundred thirty-one thousand, three hundred twenty-one".