221976704 has 16 divisors (see below), whose sum is σ = 442219470. Its totient is φ = 110988288.

The previous prime is 221976679. The next prime is 221976719. The reversal of 221976704 is 407679122.

It can be written as a sum of positive squares in only one way, i.e., 148840000 + 73136704 = 12200^2 + 8552^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 866969 + ... + 867224.

Almost surely, 2^221976704 is an apocalyptic number.

It is an amenable number.

221976704 is a deficient number, since it is larger than the sum of its proper divisors (220242766).

221976704 is an equidigital number, since it uses as much as digits as its factorization.

221976704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734207 (or 1734195 counting only the distinct ones).

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

The square root of 221976704 is about 14898.8826426682. The cubic root of 221976704 is about 605.4837139672.

The spelling of 221976704 in words is "two hundred twenty-one million, nine hundred seventy-six thousand, seven hundred four".