13651321 has 2 divisors, whose sum is σ = 13651322. Its totient is φ = 13651320.

The previous prime is 13651303. The next prime is 13651331. The reversal of 13651321 is 12315631.

It is a happy number.

13651321 is digitally balanced in base 2 and base 3, because in such bases 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., 11634921 + 2016400 = 3411^2 + 1420^2 .

It is an emirp because it is prime and its reverse (12315631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13651321 - 2⁹ = 13650809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13651292 and 13651301.

It is not a weakly prime, because it can be changed into another prime (13651301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6825660 + 6825661.

It is an arithmetic number, because the mean of its divisors is an integer number (6825661).

Almost surely, 2^13651321 is an apocalyptic number.

It is an amenable number.

13651321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13651321 is an equidigital number, since it uses as much as digits as its factorization.

13651321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 22.

The square root of 13651321 is about 3694.7694109376. The cubic root of 13651321 is about 238.9965102809.

Adding to 13651321 its reverse (12315631), we get a palindrome (25966952).

The spelling of 13651321 in words is "thirteen million, six hundred fifty-one thousand, three hundred twenty-one".