55530550 has 12 divisors (see below), whose sum is σ = 103286916. Its totient is φ = 22212200.

The previous prime is 55530529. The next prime is 55530577. The reversal of 55530550 is 5503555.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555256 + ... + 555355.

It is an arithmetic number, because the mean of its divisors is an integer number (8607243).

Almost surely, 2^55530550 is an apocalyptic number.

55530550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55530550 is a deficient number, since it is larger than the sum of its proper divisors (47756366).

55530550 is a wasteful number, since it uses less digits than its factorization.

55530550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110623 (or 1110618 counting only the distinct ones).

The product of its (nonzero) digits is 9375, while the sum is 28.

The square root of 55530550 is about 7451.8823125436. The cubic root of 55530550 is about 381.5141571619.

The spelling of 55530550 in words is "fifty-five million, five hundred thirty thousand, five hundred fifty".