13515155 has 4 divisors (see below), whose sum is σ = 16218192. Its totient is φ = 10812120.

The previous prime is 13515133. The next prime is 13515157. The reversal of 13515155 is 55151531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55151531 = 277 ⋅199103.

It is not a de Polignac number, because 13515155 - 2⁶ = 13515091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13515157) 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 3 ways as a sum of consecutive naturals, for example, 1351511 + ... + 1351520.

It is an arithmetic number, because the mean of its divisors is an integer number (4054548).

Almost surely, 2^13515155 is an apocalyptic number.

13515155 is a deficient number, since it is larger than the sum of its proper divisors (2703037).

13515155 is an equidigital number, since it uses as much as digits as its factorization.

13515155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2703036.

The product of its digits is 1875, while the sum is 26.

The square root of 13515155 is about 3676.2963699898. The cubic root of 13515155 is about 238.1992247080.

Adding to 13515155 its reverse (55151531), we get a palindrome (68666686).

The spelling of 13515155 in words is "thirteen million, five hundred fifteen thousand, one hundred fifty-five".