221989357296 has 960 divisors, whose sum is σ = 844195968000. Its totient is φ = 54484254720.

The previous prime is 221989357243. The next prime is 221989357319. The reversal of 221989357296 is 692753989122.

221989357296 is a `hidden beast` number, since 2 + 2 + 198 + 9 + 357 + 2 + 96 = 666.

It is a super-2 number, since 2×221989357296² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

Its product of digits (29393280) is a multiple of the sum of its prime factors (567).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 481538506 + ... + 481538966.

It is an arithmetic number, because the mean of its divisors is an integer number (879370800).

Almost surely, 2^221989357296 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 221989357296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (422097984000).

221989357296 is an abundant number, since it is smaller than the sum of its proper divisors (622206610704).

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

221989357296 is a wasteful number, since it uses less digits than its factorization.

221989357296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567 (or 538 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 63.

The spelling of 221989357296 in words is "two hundred twenty-one billion, nine hundred eighty-nine million, three hundred fifty-seven thousand, two hundred ninety-six".