55505503 has 4 divisors (see below), whose sum is σ = 56174328. Its totient is φ = 54836680.

The previous prime is 55505497. The next prime is 55505519. The reversal of 55505503 is 30550555.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55505503 - 2⁹ = 55504991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334288 + ... + 334453.

It is an arithmetic number, because the mean of its divisors is an integer number (14043582).

Almost surely, 2^55505503 is an apocalyptic number.

55505503 is a deficient number, since it is larger than the sum of its proper divisors (668825).

55505503 is an equidigital number, since it uses as much as digits as its factorization.

55505503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668824.

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

The square root of 55505503 is about 7450.2015408981. The cubic root of 55505503 is about 381.4567880071.

The spelling of 55505503 in words is "fifty-five million, five hundred five thousand, five hundred three".