2221304213 has 8 divisors (see below), whose sum is σ = 2360007480. Its totient is φ = 2086741440.

The previous prime is 2221304209. The next prime is 2221304227. The reversal of 2221304213 is 3124031222.

It can be written as a sum of positive squares in 4 ways, for example, as 1394051569 + 827252644 = 37337^2 + 28762^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2221304213 - 2² = 2221304209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221304233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1034018 + ... + 1036163.

It is an arithmetic number, because the mean of its divisors is an integer number (295000935).

Almost surely, 2^2221304213 is an apocalyptic number.

It is an amenable number.

2221304213 is a deficient number, since it is larger than the sum of its proper divisors (138703267).

2221304213 is a wasteful number, since it uses less digits than its factorization.

2221304213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2070247.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2221304213 is about 47130.7141151076. The cubic root of 2221304213 is about 1304.7761614099.

Adding to 2221304213 its reverse (3124031222), we get a palindrome (5345335435).

The spelling of 2221304213 in words is "two billion, two hundred twenty-one million, three hundred four thousand, two hundred thirteen".