221880064 has 36 divisors (see below), whose sum is σ = 506167984. Its totient is φ = 95090688.

The previous prime is 221880059. The next prime is 221880079. The reversal of 221880064 is 460088122.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60117 + ... + 63700.

Almost surely, 2^221880064 is an apocalyptic number.

It is an amenable number.

221880064 is an abundant number, since it is smaller than the sum of its proper divisors (284287920).

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

221880064 is an equidigital number, since it uses as much as digits as its factorization.

221880064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123840 (or 123826 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 221880064 is about 14895.6390933723. The cubic root of 221880064 is about 605.3958332142.

The spelling of 221880064 in words is "two hundred twenty-one million, eight hundred eighty thousand, sixty-four".