55404503 has 16 divisors (see below), whose sum is σ = 70946304. Its totient is φ = 42003360.

The previous prime is 55404499. The next prime is 55404521. The reversal of 55404503 is 30540455.

It is not a de Polignac number, because 55404503 - 2² = 55404499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55404563) 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 15 ways as a sum of consecutive naturals, for example, 6875 + ... + 12572.

It is an arithmetic number, because the mean of its divisors is an integer number (4434144).

Almost surely, 2^55404503 is an apocalyptic number.

55404503 is a deficient number, since it is larger than the sum of its proper divisors (15541801).

55404503 is a wasteful number, since it uses less digits than its factorization.

55404503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19502.

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 55404503 is about 7443.4201144366. The cubic root of 55404503 is about 381.2252762611.

Adding to 55404503 its reverse (30540455), we get a palindrome (85944958).

The spelling of 55404503 in words is "fifty-five million, four hundred four thousand, five hundred three".