13003155 has 48 divisors (see below), whose sum is σ = 24916320. Its totient is φ = 6220800.

The previous prime is 13003129. The next prime is 13003171. The reversal of 13003155 is 55130031.

It is a happy number.

13003155 is nontrivially palindromic in base 4.

13003155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13003155 - 2⁶ = 13003091 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 53835 + ... + 54075.

It is an arithmetic number, because the mean of its divisors is an integer number (519090).

Almost surely, 2^13003155 is an apocalyptic number.

13003155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13003155 is a deficient number, since it is larger than the sum of its proper divisors (11913165).

13003155 is a wasteful number, since it uses less digits than its factorization.

13003155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 18.

The square root of 13003155 is about 3605.9887687013. The cubic root of 13003155 is about 235.1524889282.

Adding to 13003155 its reverse (55130031), we get a palindrome (68133186).

The spelling of 13003155 in words is "thirteen million, three thousand, one hundred fifty-five".