13351321 has 4 divisors (see below), whose sum is σ = 13360000. Its totient is φ = 13342644.

The previous prime is 13351279. The next prime is 13351333. The reversal of 13351321 is 12315331.

13351321 is digitally balanced in base 3, 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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12315331 = 7 ⋅1759333.

It is a cyclic number.

It is not a de Polignac number, because 13351321 - 2⁷ = 13351193 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13351361) 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, 1341 + ... + 5338.

It is an arithmetic number, because the mean of its divisors is an integer number (3340000).

Almost surely, 2^13351321 is an apocalyptic number.

It is an amenable number.

13351321 is a deficient number, since it is larger than the sum of its proper divisors (8679).

13351321 is an equidigital number, since it uses as much as digits as its factorization.

13351321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8678.

The product of its digits is 270, while the sum is 19.

The square root of 13351321 is about 3653.9459492445. The cubic root of 13351321 is about 237.2328060682.

Adding to 13351321 its reverse (12315331), we get a palindrome (25666652).

The spelling of 13351321 in words is "thirteen million, three hundred fifty-one thousand, three hundred twenty-one".