2221999999 has 4 divisors (see below), whose sum is σ = 2223610360. Its totient is φ = 2220389640.

The previous prime is 2221999951. The next prime is 2222000029. The reversal of 2221999999 is 9999991222.

2221999999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2221999999 - 2⁹ = 2221999487 is a prime.

It is a Duffinian number.

2221999999 is a modest number, since divided by 99999 gives 22219 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221999919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 803109 + ... + 805870.

It is an arithmetic number, because the mean of its divisors is an integer number (555902590).

Almost surely, 2^2221999999 is an apocalyptic number.

2221999999 is a deficient number, since it is larger than the sum of its proper divisors (1610361).

2221999999 is a wasteful number, since it uses less digits than its factorization.

2221999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610360.

The product of its digits is 4251528, while the sum is 61.

The square root of 2221999999 is about 47138.0949869636. The cubic root of 2221999999 is about 1304.9123802145.

The spelling of 2221999999 in words is "two billion, two hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred ninety-nine".