13665155 has 8 divisors (see below), whose sum is σ = 18740832. Its totient is φ = 9370368.

The previous prime is 13665143. The next prime is 13665163. The reversal of 13665155 is 55156631.

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

It is not a de Polignac number, because 13665155 - 2²⁰ = 12616579 is a prime.

It is a super-2 number, since 2×13665155² = 373472922348050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195182 + ... + 195251.

It is an arithmetic number, because the mean of its divisors is an integer number (2342604).

Almost surely, 2^13665155 is an apocalyptic number.

13665155 is a deficient number, since it is larger than the sum of its proper divisors (5075677).

13665155 is an equidigital number, since it uses as much as digits as its factorization.

13665155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390445.

The product of its digits is 13500, while the sum is 32.

The square root of 13665155 is about 3696.6410428929. The cubic root of 13665155 is about 239.0772145954.

The spelling of 13665155 in words is "thirteen million, six hundred sixty-five thousand, one hundred fifty-five".