221775895444 has 24 divisors (see below), whose sum is σ = 388684392320. Its totient is φ = 110723324544.

The previous prime is 221775895381. The next prime is 221775895447. The reversal of 221775895444 is 444598577122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221775895447) 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, 8878837 + ... + 8903779.

Almost surely, 2^221775895444 is an apocalyptic number.

It is an amenable number.

221775895444 is a deficient number, since it is larger than the sum of its proper divisors (166908496876).

221775895444 is a wasteful number, since it uses less digits than its factorization.

221775895444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28159 (or 28157 counting only the distinct ones).

The product of its digits is 22579200, while the sum is 58.

The spelling of 221775895444 in words is "two hundred twenty-one billion, seven hundred seventy-five million, eight hundred ninety-five thousand, four hundred forty-four".