13609155 has 64 divisors (see below), whose sum is σ = 26615808. Its totient is φ = 5806080.

The previous prime is 13609153. The next prime is 13609157. The reversal of 13609155 is 55190631.

It is an interprime number because it is at equal distance from previous prime (13609153) and next prime (13609157).

It is not a de Polignac number, because 13609155 - 2¹ = 13609153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13609151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 120379 + ... + 120491.

It is an arithmetic number, because the mean of its divisors is an integer number (415872).

Almost surely, 2^13609155 is an apocalyptic number.

13609155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13609155 is a deficient number, since it is larger than the sum of its proper divisors (13006653).

13609155 is a wasteful number, since it uses less digits than its factorization.

13609155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 13609155 is about 3689.0588230604. The cubic root of 13609155 is about 238.7501868551.

Adding to 13609155 its reverse (55190631), we get a palindrome (68799786).

The spelling of 13609155 in words is "thirteen million, six hundred nine thousand, one hundred fifty-five".