221049803520 has 1080 divisors, whose sum is σ = 991164780144. Its totient is φ = 46625144832.

The previous prime is 221049803509. The next prime is 221049803539. The reversal of 221049803520 is 25308940122.

It is a happy number.

221049803520 is a `hidden beast` number, since 2 + 2 + 10 + 49 + 80 + 3 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (1080).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 119 ways as a sum of consecutive naturals, for example, 66042487 + ... + 66045833.

Almost surely, 2^221049803520 is an apocalyptic number.

221049803520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221049803520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (495582390072).

221049803520 is an abundant number, since it is smaller than the sum of its proper divisors (770114976624).

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

221049803520 is a wasteful number, since it uses less digits than its factorization.

221049803520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3407 (or 3377 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 221049803520 in words is "two hundred twenty-one billion, forty-nine million, eight hundred three thousand, five hundred twenty".