2221001309 has 8 divisors (see below), whose sum is σ = 2270956800. Its totient is φ = 2171158416.

The previous prime is 2221001269. The next prime is 2221001317. The reversal of 2221001309 is 9031001222.

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 2221001309 - 2⁸ = 2221001053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221001609) 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, 12392 + ... + 67790.

It is an arithmetic number, because the mean of its divisors is an integer number (283869600).

Almost surely, 2^2221001309 is an apocalyptic number.

It is an amenable number.

2221001309 is a deficient number, since it is larger than the sum of its proper divisors (49955491).

2221001309 is an equidigital number, since it uses as much as digits as its factorization.

2221001309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56299.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2221001309 is about 47127.5005596520. The cubic root of 2221001309 is about 1304.7168509258.

The spelling of 2221001309 in words is "two billion, two hundred twenty-one million, one thousand, three hundred nine".