54543455221 has 4 divisors (see below), whose sum is σ = 55811907712. Its totient is φ = 53275002732.

The previous prime is 54543455203. The next prime is 54543455279. The reversal of 54543455221 is 12255434545.

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 54543455221 - 2²⁵ = 54509900789 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 (54543455521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 634226181 + ... + 634226266.

It is an arithmetic number, because the mean of its divisors is an integer number (13952976928).

Almost surely, 2^54543455221 is an apocalyptic number.

It is an amenable number.

54543455221 is a deficient number, since it is larger than the sum of its proper divisors (1268452491).

54543455221 is a wasteful number, since it uses less digits than its factorization.

54543455221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268452490.

The product of its digits is 480000, while the sum is 40.

Adding to 54543455221 its reverse (12255434545), we get a palindrome (66798889766).

The spelling of 54543455221 in words is "fifty-four billion, five hundred forty-three million, four hundred fifty-five thousand, two hundred twenty-one".