221797064 has 16 divisors (see below), whose sum is σ = 429285120. Its totient is φ = 107321040.

The previous prime is 221797061. The next prime is 221797087. The reversal of 221797064 is 460797122.

It is not an unprimeable number, because it can be changed into a prime (221797061) by changing a digit.

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, 446924 + ... + 447419.

It is an arithmetic number, because the mean of its divisors is an integer number (26830320).

Almost surely, 2^221797064 is an apocalyptic number.

It is an amenable number.

221797064 is a deficient number, since it is larger than the sum of its proper divisors (207488056).

221797064 is a wasteful number, since it uses less digits than its factorization.

221797064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894380 (or 894376 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 221797064 is about 14892.8527824591. The cubic root of 221797064 is about 605.3203357884.

The spelling of 221797064 in words is "two hundred twenty-one million, seven hundred ninety-seven thousand, sixty-four".