2305716221 has 4 divisors (see below), whose sum is σ = 2361953244. Its totient is φ = 2249479200.

The previous prime is 2305716163. The next prime is 2305716223. The reversal of 2305716221 is 1226175032.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 794450596 + 1511265625 = 28186^2 + 38875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2305716221 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 (2305716223) 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, 28118450 + ... + 28118531.

It is an arithmetic number, because the mean of its divisors is an integer number (590488311).

Almost surely, 2^2305716221 is an apocalyptic number.

It is an amenable number.

2305716221 is a deficient number, since it is larger than the sum of its proper divisors (56237023).

2305716221 is an equidigital number, since it uses as much as digits as its factorization.

2305716221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56237022.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 2305716221 is about 48017.8739741776. The cubic root of 2305716221 is about 1321.0987601143.

The spelling of 2305716221 in words is "two billion, three hundred five million, seven hundred sixteen thousand, two hundred twenty-one".