221064416 has 12 divisors (see below), whose sum is σ = 435220632. Its totient is φ = 110532192.

The previous prime is 221064407. The next prime is 221064451. The reversal of 221064416 is 614460122.

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 as a sum of consecutive naturals, namely, 3454100 + ... + 3454163.

It is an arithmetic number, because the mean of its divisors is an integer number (36268386).

Almost surely, 2^221064416 is an apocalyptic number.

It is an amenable number.

221064416 is a deficient number, since it is larger than the sum of its proper divisors (214156216).

221064416 is an equidigital number, since it uses as much as digits as its factorization.

221064416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6908273 (or 6908265 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 221064416 is about 14868.2351340030. The cubic root of 221064416 is about 604.6530952981.

The spelling of 221064416 in words is "two hundred twenty-one million, sixty-four thousand, four hundred sixteen".