55155560 has 32 divisors (see below), whose sum is σ = 126208800. Its totient is φ = 21687360.

The previous prime is 55155559. The next prime is 55155629. The reversal of 55155560 is 6555155.

55155560 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 7 ways as a sum of consecutive naturals, for example, 9326 + ... + 14045.

It is an arithmetic number, because the mean of its divisors is an integer number (3944025).

Almost surely, 2^55155560 is an apocalyptic number.

It is an amenable number.

55155560 is an abundant number, since it is smaller than the sum of its proper divisors (71053240).

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

55155560 is a wasteful number, since it uses less digits than its factorization.

55155560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23441 (or 23437 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 32.

The square root of 55155560 is about 7426.6789347595. The cubic root of 55155560 is about 380.6534463296.

The spelling of 55155560 in words is "fifty-five million, one hundred fifty-five thousand, five hundred sixty".