13321555 has 8 divisors (see below), whose sum is σ = 17215632. Its totient is φ = 9837408.

The previous prime is 13321513. The next prime is 13321559. The reversal of 13321555 is 55512331.

13321555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13321555 - 2²³ = 4932947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13321559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102409 + ... + 102538.

It is an arithmetic number, because the mean of its divisors is an integer number (2151954).

Almost surely, 2^13321555 is an apocalyptic number.

13321555 is a deficient number, since it is larger than the sum of its proper divisors (3894077).

13321555 is a wasteful number, since it uses less digits than its factorization.

13321555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204965.

The product of its digits is 2250, while the sum is 25.

The square root of 13321555 is about 3649.8705456495. The cubic root of 13321555 is about 237.0563759374.

Adding to 13321555 its reverse (55512331), we get a palindrome (68833886).

It can be divided in two parts, 133 and 21555, that multiplied together give a triangular number (2866815 = T₂₃₉₄).

The spelling of 13321555 in words is "thirteen million, three hundred twenty-one thousand, five hundred fifty-five".