55105503 has 4 divisors (see below), whose sum is σ = 73474008. Its totient is φ = 36737000.

The previous prime is 55105451. The next prime is 55105537. The reversal of 55105503 is 30550155.

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 55105503 - 2⁹ = 55104991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55105003) 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, 9184248 + ... + 9184253.

It is an arithmetic number, because the mean of its divisors is an integer number (18368502).

Almost surely, 2^55105503 is an apocalyptic number.

55105503 is a deficient number, since it is larger than the sum of its proper divisors (18368505).

55105503 is a wasteful number, since it uses less digits than its factorization.

55105503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18368504.

The product of its (nonzero) digits is 1875, while the sum is 24.

The square root of 55105503 is about 7423.3080900634. The cubic root of 55105503 is about 380.5382561487.

Adding to 55105503 its reverse (30550155), we get a palindrome (85655658).

The spelling of 55105503 in words is "fifty-five million, one hundred five thousand, five hundred three".