55531103 has 4 divisors (see below), whose sum is σ = 56822568. Its totient is φ = 54239640.

The previous prime is 55531093. The next prime is 55531139. The reversal of 55531103 is 30113555.

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 55531103 - 2⁴ = 55531087 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 (55531183) 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 3 ways as a sum of consecutive naturals, for example, 645668 + ... + 645753.

It is an arithmetic number, because the mean of its divisors is an integer number (14205642).

Almost surely, 2^55531103 is an apocalyptic number.

55531103 is a deficient number, since it is larger than the sum of its proper divisors (1291465).

55531103 is a wasteful number, since it uses less digits than its factorization.

55531103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291464.

The product of its (nonzero) digits is 1125, while the sum is 23.

The square root of 55531103 is about 7451.9194171703. The cubic root of 55531103 is about 381.5154235917.

Adding to 55531103 its reverse (30113555), we get a palindrome (85644658).

The spelling of 55531103 in words is "fifty-five million, five hundred thirty-one thousand, one hundred three".