550550503 has 4 divisors (see below), whose sum is σ = 551729880. Its totient is φ = 549371128.

The previous prime is 550550489. The next prime is 550550509. The reversal of 550550503 is 305055055.

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 550550503 - 2⁹ = 550549991 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 (550550509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 588988 + ... + 589921.

It is an arithmetic number, because the mean of its divisors is an integer number (137932470).

Almost surely, 2^550550503 is an apocalyptic number.

550550503 is a deficient number, since it is larger than the sum of its proper divisors (1179377).

550550503 is a wasteful number, since it uses less digits than its factorization.

550550503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179376.

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

The square root of 550550503 is about 23463.8126271073. The cubic root of 550550503 is about 819.5945363081.

The spelling of 550550503 in words is "five hundred fifty million, five hundred fifty thousand, five hundred three".