9721560223 has 2 divisors, whose sum is σ = 9721560224. Its totient is φ = 9721560222.

The previous prime is 9721560209. The next prime is 9721560239. The reversal of 9721560223 is 3220651279.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9721560223 - 2⁹ = 9721559711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9721560263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4860780111 + 4860780112.

It is an arithmetic number, because the mean of its divisors is an integer number (4860780112).

Almost surely, 2^9721560223 is an apocalyptic number.

9721560223 is a deficient number, since it is larger than the sum of its proper divisors (1).

9721560223 is an equidigital number, since it uses as much as digits as its factorization.

9721560223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 9721560223 is about 98597.9727124245. The cubic root of 9721560223 is about 2134.2501647894.

The spelling of 9721560223 in words is "nine billion, seven hundred twenty-one million, five hundred sixty thousand, two hundred twenty-three".