7215206689 has 2 divisors, whose sum is σ = 7215206690. Its totient is φ = 7215206688.

The previous prime is 7215206599. The next prime is 7215206717. The reversal of 7215206689 is 9866025127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3738099600 + 3477107089 = 61140^2 + 58967^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7215206689 is a prime.

It is not a weakly prime, because it can be changed into another prime (7215206389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3607603344 + 3607603345.

It is an arithmetic number, because the mean of its divisors is an integer number (3607603345).

Almost surely, 2^7215206689 is an apocalyptic number.

It is an amenable number.

7215206689 is a deficient number, since it is larger than the sum of its proper divisors (1).

7215206689 is an equidigital number, since it uses as much as digits as its factorization.

7215206689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 7215206689 is about 84942.3727535321. The cubic root of 7215206689 is about 1932.3372481616.

The spelling of 7215206689 in words is "seven billion, two hundred fifteen million, two hundred six thousand, six hundred eighty-nine".