55205103 has 16 divisors (see below), whose sum is σ = 78541056. Its totient is φ = 34369920.

The previous prime is 55205099. The next prime is 55205123. The reversal of 55205103 is 30150255.

It is not a de Polignac number, because 55205103 - 2² = 55205099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55205103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55205123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2550 + ... + 10812.

It is an arithmetic number, because the mean of its divisors is an integer number (4908816).

Almost surely, 2^55205103 is an apocalyptic number.

55205103 is a deficient number, since it is larger than the sum of its proper divisors (23335953).

55205103 is a wasteful number, since it uses less digits than its factorization.

55205103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8414.

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

The square root of 55205103 is about 7430.0136608219. The cubic root of 55205103 is about 380.7673850993.

Adding to 55205103 its reverse (30150255), we get a palindrome (85355358).

The spelling of 55205103 in words is "fifty-five million, two hundred five thousand, one hundred three".