13320551 has 2 divisors, whose sum is σ = 13320552. Its totient is φ = 13320550.

The previous prime is 13320533. The next prime is 13320557. The reversal of 13320551 is 15502331.

13320551 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13320551 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13320557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6660275 + 6660276.

It is an arithmetic number, because the mean of its divisors is an integer number (6660276).

Almost surely, 2^13320551 is an apocalyptic number.

13320551 is a deficient number, since it is larger than the sum of its proper divisors (1).

13320551 is an equidigital number, since it uses as much as digits as its factorization.

13320551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 13320551 is about 3649.7330039333. The cubic root of 13320551 is about 237.0504204119.

Adding to 13320551 its reverse (15502331), we get a palindrome (28822882).

The spelling of 13320551 in words is "thirteen million, three hundred twenty thousand, five hundred fifty-one".