221875011764 has 48 divisors (see below), whose sum is σ = 458150117376. Its totient is φ = 92004703200.

The previous prime is 221875011763. The next prime is 221875011767. The reversal of 221875011764 is 467110578122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221875011763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5311319 + ... + 5352929.

It is an arithmetic number, because the mean of its divisors is an integer number (9544794112).

Almost surely, 2^221875011764 is an apocalyptic number.

It is an amenable number.

221875011764 is an abundant number, since it is smaller than the sum of its proper divisors (236275105612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221875011764 is a wasteful number, since it uses less digits than its factorization.

221875011764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47796 (or 47794 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 44.

Adding to 221875011764 its reverse (467110578122), we get a palindrome (688985589886).

The spelling of 221875011764 in words is "two hundred twenty-one billion, eight hundred seventy-five million, eleven thousand, seven hundred sixty-four".