221143450304 has 112 divisors (see below), whose sum is σ = 517355815680. Its totient is φ = 91829928960.

The previous prime is 221143450273. The next prime is 221143450321. The reversal of 221143450304 is 403054341122.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×221143450304² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1770587 + ... + 1891365.

Almost surely, 2^221143450304 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 221143450304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258677907840).

221143450304 is an abundant number, since it is smaller than the sum of its proper divisors (296212365376).

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

221143450304 is a wasteful number, since it uses less digits than its factorization.

221143450304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120926 (or 120916 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 221143450304 its reverse (403054341122), we get a palindrome (624197791426).

The spelling of 221143450304 in words is "two hundred twenty-one billion, one hundred forty-three million, four hundred fifty thousand, three hundred four".