221422000645557 has 6 divisors (see below), whose sum is σ = 319831778710262. Its totient is φ = 147614667097032.

The previous prime is 221422000645493. The next prime is 221422000645577. The reversal of 221422000645557 is 755546000224122.

221422000645557 is a `hidden beast` number, since 2 + 2 + 14 + 2 + 20 + 0 + 0 + 64 + 5 + 557 = 666.

It can be written as a sum of positive squares in only one way, i.e., 163996735066641 + 57425265578916 = 12806121^2 + 7577946^2 .

It is not a de Polignac number, because 221422000645557 - 2⁶ = 221422000645493 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 (221422000645577) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12301222258078 + ... + 12301222258095.

Almost surely, 2^{221422000645557} is an apocalyptic number.

It is an amenable number.

221422000645557 is a deficient number, since it is larger than the sum of its proper divisors (98409778064705).

221422000645557 is a wasteful number, since it uses less digits than its factorization.

221422000645557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24602444516179 (or 24602444516176 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 45.

Adding to 221422000645557 its reverse (755546000224122), we get a palindrome (976968000869679).

The spelling of 221422000645557 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, six hundred forty-five thousand, five hundred fifty-seven".