221703670055 has 40 divisors (see below), whose sum is σ = 312084462144. Its totient is φ = 151183972800.

The previous prime is 221703670051. The next prime is 221703670079. The reversal of 221703670055 is 550076307122.

221703670055 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 221703670055 - 2² = 221703670051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221703670051) 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 39 ways as a sum of consecutive naturals, for example, 2121890 + ... + 2223920.

Almost surely, 2^221703670055 is an apocalyptic number.

221703670055 is a deficient number, since it is larger than the sum of its proper divisors (90380792089).

221703670055 is an equidigital number, since it uses as much as digits as its factorization.

221703670055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102245 (or 102224 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 38.

Adding to 221703670055 its reverse (550076307122), we get a palindrome (771779977177).

The spelling of 221703670055 in words is "two hundred twenty-one billion, seven hundred three million, six hundred seventy thousand, fifty-five".