2221065724 has 48 divisors (see below), whose sum is σ = 4194086400. Its totient is φ = 1026020736.

The previous prime is 2221065709. The next prime is 2221065727. The reversal of 2221065724 is 4275601222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221065727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 496104 + ... + 500560.

It is an arithmetic number, because the mean of its divisors is an integer number (87376800).

Almost surely, 2^2221065724 is an apocalyptic number.

It is an amenable number.

2221065724 is a deficient number, since it is larger than the sum of its proper divisors (1973020676).

2221065724 is a wasteful number, since it uses less digits than its factorization.

2221065724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4642 (or 4640 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 2221065724 is about 47128.1839667093. The cubic root of 2221065724 is about 1304.7294642342.

Adding to 2221065724 its reverse (4275601222), we get a palindrome (6496666946).

The spelling of 2221065724 in words is "two billion, two hundred twenty-one million, sixty-five thousand, seven hundred twenty-four".