13055556 has 12 divisors (see below), whose sum is σ = 30462992. Its totient is φ = 4351848.

The previous prime is 13055533. The next prime is 13055569. The reversal of 13055556 is 65555031.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 543970 + ... + 543993.

Almost surely, 2^13055556 is an apocalyptic number.

It is an amenable number.

13055556 is an abundant number, since it is smaller than the sum of its proper divisors (17407436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13055556 is a wasteful number, since it uses less digits than its factorization.

13055556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087970 (or 1087968 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 30.

The square root of 13055556 is about 3613.2472929485. The cubic root of 13055556 is about 235.4679434010.

The spelling of 13055556 in words is "thirteen million, fifty-five thousand, five hundred fifty-six".