7211730705 has 16 divisors (see below), whose sum is σ = 11539874304. Its totient is φ = 3845888000.

The previous prime is 7211730679. The next prime is 7211730719. The reversal of 7211730705 is 5070371127.

7211730705 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7211730705 - 2¹³ = 7211722513 is a prime.

It is a super-2 number, since 2×7211730705² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 224992 + ... + 255038.

It is an arithmetic number, because the mean of its divisors is an integer number (721242144).

Almost surely, 2^7211730705 is an apocalyptic number.

It is an amenable number.

7211730705 is a deficient number, since it is larger than the sum of its proper divisors (4328143599).

7211730705 is a wasteful number, since it uses less digits than its factorization.

7211730705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46056.

The product of its (nonzero) digits is 10290, while the sum is 33.

The square root of 7211730705 is about 84921.9094521549. The cubic root of 7211730705 is about 1932.0268919674.

The spelling of 7211730705 in words is "seven billion, two hundred eleven million, seven hundred thirty thousand, seven hundred five".