55244530221 has 8 divisors (see below), whose sum is σ = 73662890784. Its totient is φ = 36827928240.

The previous prime is 55244530217. The next prime is 55244530223. The reversal of 55244530221 is 12203544255.

It is a happy number.

55244530221 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 not a de Polignac number, because 55244530221 - 2² = 55244530217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55244530223) 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, 364510 + ... + 493311.

It is an arithmetic number, because the mean of its divisors is an integer number (9207861348).

Almost surely, 2^55244530221 is an apocalyptic number.

It is an amenable number.

55244530221 is a deficient number, since it is larger than the sum of its proper divisors (18418360563).

55244530221 is a wasteful number, since it uses less digits than its factorization.

55244530221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879291.

The product of its (nonzero) digits is 48000, while the sum is 33.

The spelling of 55244530221 in words is "fifty-five billion, two hundred forty-four million, five hundred thirty thousand, two hundred twenty-one".