5503403021 has 4 divisors (see below), whose sum is σ = 5565239100. Its totient is φ = 5441566944.

The previous prime is 5503402967. The next prime is 5503403023. The reversal of 5503403021 is 1203043055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 795522025 + 4707880996 = 28205^2 + 68614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5503403021 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 (5503403023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30917906 + ... + 30918083.

It is an arithmetic number, because the mean of its divisors is an integer number (1391309775).

Almost surely, 2^5503403021 is an apocalyptic number.

It is an amenable number.

5503403021 is a deficient number, since it is larger than the sum of its proper divisors (61836079).

5503403021 is an equidigital number, since it uses as much as digits as its factorization.

5503403021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61836078.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 5503403021 is about 74184.9244860437. The cubic root of 5503403021 is about 1765.5381486507.

Adding to 5503403021 its reverse (1203043055), we get a palindrome (6706446076).

The spelling of 5503403021 in words is "five billion, five hundred three million, four hundred three thousand, twenty-one".