55000503 has 6 divisors (see below), whose sum is σ = 79445184. Its totient is φ = 36666996.

The previous prime is 55000499. The next prime is 55000507. The reversal of 55000503 is 30500055.

It is an interprime number because it is at equal distance from previous prime (55000499) and next prime (55000507).

It is not a de Polignac number, because 55000503 - 2² = 55000499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55000507) 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 5 ways as a sum of consecutive naturals, for example, 3055575 + ... + 3055592.

It is an arithmetic number, because the mean of its divisors is an integer number (13240864).

Almost surely, 2^55000503 is an apocalyptic number.

55000503 is a deficient number, since it is larger than the sum of its proper divisors (24444681).

55000503 is a wasteful number, since it uses less digits than its factorization.

55000503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6111173 (or 6111170 counting only the distinct ones).

The product of its (nonzero) digits is 375, while the sum is 18.

The square root of 55000503 is about 7416.2323992712. The cubic root of 55000503 is about 380.2964053969.

Adding to 55000503 its reverse (30500055), we get a palindrome (85500558).

The spelling of 55000503 in words is "fifty-five million, five hundred three", and thus it is an aban number.