13553303321 has 2 divisors, whose sum is σ = 13553303322. Its totient is φ = 13553303320.

The previous prime is 13553303287. The next prime is 13553303339. The reversal of 13553303321 is 12330335531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13303315600 + 249987721 = 115340^2 + 15811^2 .

It is a cyclic number.

It is not a de Polignac number, because 13553303321 - 2¹⁴ = 13553286937 is a prime.

It is a super-2 number, since 2×13553303321² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13553303341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6776651660 + 6776651661.

It is an arithmetic number, because the mean of its divisors is an integer number (6776651661).

Almost surely, 2^13553303321 is an apocalyptic number.

It is an amenable number.

13553303321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13553303321 is an equidigital number, since it uses as much as digits as its factorization.

13553303321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12150, while the sum is 29.

Adding to 13553303321 its reverse (12330335531), we get a palindrome (25883638852).

The spelling of 13553303321 in words is "thirteen billion, five hundred fifty-three million, three hundred three thousand, three hundred twenty-one".