13155556 has 6 divisors (see below), whose sum is σ = 23022230. Its totient is φ = 6577776.

The previous prime is 13155551. The next prime is 13155559. The reversal of 13155556 is 65555131.

13155556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11289600 + 1865956 = 3360^2 + 1366^2 .

It is not an unprimeable number, because it can be changed into a prime (13155551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1644441 + ... + 1644448.

Almost surely, 2^13155556 is an apocalyptic number.

It is an amenable number.

13155556 is a deficient number, since it is larger than the sum of its proper divisors (9866674).

13155556 is a wasteful number, since it uses less digits than its factorization.

13155556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3288893 (or 3288891 counting only the distinct ones).

The product of its digits is 11250, while the sum is 31.

The square root of 13155556 is about 3627.0588635973. The cubic root of 13155556 is about 236.0676096630.

The spelling of 13155556 in words is "thirteen million, one hundred fifty-five thousand, five hundred fifty-six".