2221784704 has 16 divisors (see below), whose sum is σ = 4426211970. Its totient is φ = 1110892288.

The previous prime is 2221784687. The next prime is 2221784713. The reversal of 2221784704 is 4074871222.

It can be written as a sum of positive squares in only one way, i.e., 1556144704 + 665640000 = 39448^2 + 25800^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8678719 + ... + 8678974.

Almost surely, 2^2221784704 is an apocalyptic number.

It is an amenable number.

2221784704 is a deficient number, since it is larger than the sum of its proper divisors (2204427266).

2221784704 is an equidigital number, since it uses as much as digits as its factorization.

2221784704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17357707 (or 17357695 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 37.

The square root of 2221784704 is about 47135.8112691402. The cubic root of 2221784704 is about 1304.8702334720.

The spelling of 2221784704 in words is "two billion, two hundred twenty-one million, seven hundred eighty-four thousand, seven hundred four".