55210503 has 4 divisors (see below), whose sum is σ = 73614008. Its totient is φ = 36807000.

The previous prime is 55210487. The next prime is 55210513. The reversal of 55210503 is 30501255.

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

It is not a de Polignac number, because 55210503 - 2⁴ = 55210487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55210503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55210513) 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, 9201748 + ... + 9201753.

It is an arithmetic number, because the mean of its divisors is an integer number (18403502).

Almost surely, 2^55210503 is an apocalyptic number.

55210503 is a deficient number, since it is larger than the sum of its proper divisors (18403505).

55210503 is a wasteful number, since it uses less digits than its factorization.

55210503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18403504.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 55210503 is about 7430.3770429232. The cubic root of 55210503 is about 380.7797998746.

Adding to 55210503 its reverse (30501255), we get a palindrome (85711758).

The spelling of 55210503 in words is "fifty-five million, two hundred ten thousand, five hundred three".