13155617 has 4 divisors (see below), whose sum is σ = 13176240. Its totient is φ = 13134996.

The previous prime is 13155613. The next prime is 13155631. The reversal of 13155617 is 71655131.

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.

It is a cyclic number.

It is not a de Polignac number, because 13155617 - 2² = 13155613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13155617.

It is not an unprimeable number, because it can be changed into a prime (13155613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9323 + ... + 10640.

It is an arithmetic number, because the mean of its divisors is an integer number (3294060).

Almost surely, 2^13155617 is an apocalyptic number.

It is an amenable number.

13155617 is a deficient number, since it is larger than the sum of its proper divisors (20623).

13155617 is an equidigital number, since it uses as much as digits as its factorization.

13155617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20622.

The product of its digits is 3150, while the sum is 29.

The square root of 13155617 is about 3627.0672726047. The cubic root of 13155617 is about 236.0679745305.

It can be divided in two parts, 131 and 55617, that multiplied together give a palindrome (7285827).

The spelling of 13155617 in words is "thirteen million, one hundred fifty-five thousand, six hundred seventeen".