55511103 has 16 divisors (see below), whose sum is σ = 82494720. Its totient is φ = 32996736.

The previous prime is 55511081. The next prime is 55511123. The reversal of 55511103 is 30111555.

It is not a de Polignac number, because 55511103 - 2⁶ = 55511039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55511103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55511123) 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, 27675 + ... + 29612.

It is an arithmetic number, because the mean of its divisors is an integer number (5155920).

Almost surely, 2^55511103 is an apocalyptic number.

55511103 is a deficient number, since it is larger than the sum of its proper divisors (26983617).

55511103 is a wasteful number, since it uses less digits than its factorization.

55511103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57326.

The product of its (nonzero) digits is 375, while the sum is 21.

The square root of 55511103 is about 7450.5773601782. The cubic root of 55511103 is about 381.4696160816.

Adding to 55511103 its reverse (30111555), we get a palindrome (85622658).

The spelling of 55511103 in words is "fifty-five million, five hundred eleven thousand, one hundred three".