13109555 has 8 divisors (see below), whose sum is σ = 15966672. Its totient is φ = 10330848.

The previous prime is 13109549. The next prime is 13109557. The reversal of 13109555 is 55590131.

It is a happy number.

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 13109555 - 2⁶ = 13109491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13109557) 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, 19232 + ... + 19901.

It is an arithmetic number, because the mean of its divisors is an integer number (1995834).

Almost surely, 2^13109555 is an apocalyptic number.

13109555 is a deficient number, since it is larger than the sum of its proper divisors (2857117).

13109555 is an equidigital number, since it uses as much as digits as its factorization.

13109555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39205.

The product of its (nonzero) digits is 3375, while the sum is 29.

The square root of 13109555 is about 3620.7119465652. The cubic root of 13109555 is about 235.7921359889.

Adding to 13109555 its reverse (55590131), we get a palindrome (68699686).

The spelling of 13109555 in words is "thirteen million, one hundred nine thousand, five hundred fifty-five".