55023143221 has 8 divisors (see below), whose sum is σ = 55170158400. Its totient is φ = 54876177600.

The previous prime is 55023143167. The next prime is 55023143239. The reversal of 55023143221 is 12234132055.

55023143221 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 55023143221 - 2⁹ = 55023142709 is a prime.

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 55023143221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55023143321) 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, 3528640 + ... + 3544198.

It is an arithmetic number, because the mean of its divisors is an integer number (6896269800).

Almost surely, 2^55023143221 is an apocalyptic number.

It is an amenable number.

55023143221 is a deficient number, since it is larger than the sum of its proper divisors (147015179).

55023143221 is a wasteful number, since it uses less digits than its factorization.

55023143221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24779.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 55023143221 its reverse (12234132055), we get a palindrome (67257275276).

The spelling of 55023143221 in words is "fifty-five billion, twenty-three million, one hundred forty-three thousand, two hundred twenty-one".