55515556 has 12 divisors (see below), whose sum is σ = 97267968. Its totient is φ = 27724712.

The previous prime is 55515547. The next prime is 55515569. The reversal of 55515556 is 65551555.

55515556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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, 4276 + ... + 11371.

It is an arithmetic number, because the mean of its divisors is an integer number (8105664).

Almost surely, 2^55515556 is an apocalyptic number.

It is an amenable number.

55515556 is a deficient number, since it is larger than the sum of its proper divisors (41752412).

55515556 is a wasteful number, since it uses less digits than its factorization.

55515556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16538 (or 16536 counting only the distinct ones).

The product of its digits is 93750, while the sum is 37.

The square root of 55515556 is about 7450.8761900866. The cubic root of 55515556 is about 381.4798160757.

The spelling of 55515556 in words is "fifty-five million, five hundred fifteen thousand, five hundred fifty-six".