2306722721 has 8 divisors (see below), whose sum is σ = 2429710080. Its totient is φ = 2183893488.

The previous prime is 2306722703. The next prime is 2306722723. The reversal of 2306722721 is 1272276032.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2306722721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2306722723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8966 + ... + 68511.

It is an arithmetic number, because the mean of its divisors is an integer number (303713760).

Almost surely, 2^2306722721 is an apocalyptic number.

It is an amenable number.

2306722721 is a deficient number, since it is larger than the sum of its proper divisors (122987359).

2306722721 is a wasteful number, since it uses less digits than its factorization.

2306722721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79063.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 2306722721 is about 48028.3533030230. The cubic root of 2306722721 is about 1321.2909624991.

Adding to 2306722721 its reverse (1272276032), we get a palindrome (3578998753).

The spelling of 2306722721 in words is "two billion, three hundred six million, seven hundred twenty-two thousand, seven hundred twenty-one".