13552321 has 2 divisors, whose sum is σ = 13552322. Its totient is φ = 13552320.

The previous prime is 13552307. The next prime is 13552327. The reversal of 13552321 is 12325531.

13552321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11833600 + 1718721 = 3440^2 + 1311^2 .

It is a cyclic number.

It is not a de Polignac number, because 13552321 - 2⁹ = 13551809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13552292 and 13552301.

It is not a weakly prime, because it can be changed into another prime (13552327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6776160 + 6776161.

It is an arithmetic number, because the mean of its divisors is an integer number (6776161).

Almost surely, 2^13552321 is an apocalyptic number.

It is an amenable number.

13552321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13552321 is an equidigital number, since it uses as much as digits as its factorization.

13552321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 900, while the sum is 22.

The square root of 13552321 is about 3681.3477151717. The cubic root of 13552321 is about 238.4173701835.

Adding to 13552321 its reverse (12325531), we get a palindrome (25877852).

The spelling of 13552321 in words is "thirteen million, five hundred fifty-two thousand, three hundred twenty-one".