55505003 has 4 divisors (see below), whose sum is σ = 57918288. Its totient is φ = 53091720.

The previous prime is 55504997. The next prime is 55505029. The reversal of 55505003 is 30050555.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30050555 = 5 ⋅6010111.

It is a cyclic number.

It is not a de Polignac number, because 55505003 - 2⁴ = 55504987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 2413261 = 55505003 / (5 + 5 + 5 + 0 + 5 + 0 + 0 + 3).

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 55505003.

It is not an unprimeable number, because it can be changed into a prime (55505803) 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, 1206608 + ... + 1206653.

It is an arithmetic number, because the mean of its divisors is an integer number (14479572).

Almost surely, 2^55505003 is an apocalyptic number.

55505003 is a deficient number, since it is larger than the sum of its proper divisors (2413285).

55505003 is a wasteful number, since it uses less digits than its factorization.

55505003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2413284.

The product of its (nonzero) digits is 1875, while the sum is 23.

The square root of 55505003 is about 7450.1679846833. The cubic root of 55505003 is about 381.4556426014.

Adding to 55505003 its reverse (30050555), we get a palindrome (85555558).

The spelling of 55505003 in words is "fifty-five million, five hundred five thousand, three".