13551665 has 8 divisors (see below), whose sum is σ = 16640448. Its totient is φ = 10589040.

The previous prime is 13551661. The next prime is 13551683. The reversal of 13551665 is 56615531.

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

It is not a de Polignac number, because 13551665 - 2² = 13551661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13551661) 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 7 ways as a sum of consecutive naturals, for example, 31301 + ... + 31730.

It is an arithmetic number, because the mean of its divisors is an integer number (2080056).

Almost surely, 2^13551665 is an apocalyptic number.

It is an amenable number.

13551665 is a deficient number, since it is larger than the sum of its proper divisors (3088783).

13551665 is an equidigital number, since it uses as much as digits as its factorization.

13551665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63079.

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

The square root of 13551665 is about 3681.2586162887. The cubic root of 13551665 is about 238.4135232577.

The spelling of 13551665 in words is "thirteen million, five hundred fifty-one thousand, six hundred sixty-five".