221938223472 has 240 divisors, whose sum is σ = 757351026432. Its totient is φ = 59224688640.

The previous prime is 221938223449. The next prime is 221938223473. The reversal of 221938223472 is 274322839122.

221938223472 is a `hidden beast` number, since 22 + 19 + 382 + 234 + 7 + 2 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221938223473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2195383 + ... + 2294249.

Almost surely, 2^221938223472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221938223472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (378675513216).

221938223472 is an abundant number, since it is smaller than the sum of its proper divisors (535412802960).

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

221938223472 is a wasteful number, since it uses less digits than its factorization.

221938223472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99036 (or 99027 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The spelling of 221938223472 in words is "two hundred twenty-one billion, nine hundred thirty-eight million, two hundred twenty-three thousand, four hundred seventy-two".