55304481221 has 8 divisors (see below), whose sum is σ = 60929510688. Its totient is φ = 49779010000.

The previous prime is 55304481191. The next prime is 55304481229. The reversal of 55304481221 is 12218440355.

55304481221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55304481221 - 2¹⁴ = 55304464837 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 (55304481229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24888395 + ... + 24890616.

It is an arithmetic number, because the mean of its divisors is an integer number (7616188836).

Almost surely, 2^55304481221 is an apocalyptic number.

It is an amenable number.

55304481221 is a deficient number, since it is larger than the sum of its proper divisors (5625029467).

55304481221 is a wasteful number, since it uses less digits than its factorization.

55304481221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49779123.

The product of its (nonzero) digits is 38400, while the sum is 35.

The spelling of 55304481221 in words is "fifty-five billion, three hundred four million, four hundred eighty-one thousand, two hundred twenty-one".