5545555403221 has 4 divisors (see below), whose sum is σ = 5573422516000. Its totient is φ = 5517688290444.

The previous prime is 5545555403189. The next prime is 5545555403249. The reversal of 5545555403221 is 1223045555455.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5545555403221 - 2⁵ = 5545555403189 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 (5545555403291) 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, 13933556091 + ... + 13933556488.

It is an arithmetic number, because the mean of its divisors is an integer number (1393355629000).

Almost surely, 2^{5545555403221} is an apocalyptic number.

It is an amenable number.

5545555403221 is a deficient number, since it is larger than the sum of its proper divisors (27867112779).

5545555403221 is a wasteful number, since it uses less digits than its factorization.

5545555403221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27867112778.

The product of its (nonzero) digits is 3000000, while the sum is 46.

The spelling of 5545555403221 in words is "five trillion, five hundred forty-five billion, five hundred fifty-five million, four hundred three thousand, two hundred twenty-one".