2213665321 has 4 divisors (see below), whose sum is σ = 2529903232. Its totient is φ = 1897427412.

The previous prime is 2213665283. The next prime is 2213665331. The reversal of 2213665321 is 1235663122.

It is a happy number.

2213665321 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2213665321 - 2¹¹ = 2213663273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2213665331) 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, 158118945 + ... + 158118958.

It is an arithmetic number, because the mean of its divisors is an integer number (632475808).

Almost surely, 2^2213665321 is an apocalyptic number.

It is an amenable number.

2213665321 is a deficient number, since it is larger than the sum of its proper divisors (316237911).

2213665321 is an equidigital number, since it uses as much as digits as its factorization.

2213665321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316237910.

The product of its digits is 12960, while the sum is 31.

The square root of 2213665321 is about 47049.6048973846. The cubic root of 2213665321 is about 1303.2787691276.

The spelling of 2213665321 in words is "two billion, two hundred thirteen million, six hundred sixty-five thousand, three hundred twenty-one".