55331310550221 has 24 divisors (see below), whose sum is σ = 82508688677376. Its totient is φ = 35694364511520.

The previous prime is 55331310550199. The next prime is 55331310550261. The reversal of 55331310550221 is 12205501313355.

55331310550221 is a `hidden beast` number, since 5 + 5 + 33 + 13 + 105 + 502 + 2 + 1 = 666.

55331310550221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55331310550221 - 2⁶ = 55331310550157 is a prime.

It is a super-3 number, since 3×55331310550221³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55331310550261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5975265 + ... + 12098198.

It is an arithmetic number, because the mean of its divisors is an integer number (3437862028224).

Almost surely, 2^{55331310550221} is an apocalyptic number.

It is an amenable number.

55331310550221 is a deficient number, since it is larger than the sum of its proper divisors (27177378127155).

55331310550221 is a wasteful number, since it uses less digits than its factorization.

55331310550221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18084473 (or 18084470 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 36.

Adding to 55331310550221 its reverse (12205501313355), we get a palindrome (67536811863576).

The spelling of 55331310550221 in words is "fifty-five trillion, three hundred thirty-one billion, three hundred ten million, five hundred fifty thousand, two hundred twenty-one".