7215727213 has 2 divisors, whose sum is σ = 7215727214. Its totient is φ = 7215727212.

The previous prime is 7215727177. The next prime is 7215727219. The reversal of 7215727213 is 3127275127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5585021289 + 1630705924 = 74733^2 + 40382^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7215727213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7215727219) 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 as a sum of consecutive naturals, namely, 3607863606 + 3607863607.

It is an arithmetic number, because the mean of its divisors is an integer number (3607863607).

Almost surely, 2^7215727213 is an apocalyptic number.

It is an amenable number.

7215727213 is a deficient number, since it is larger than the sum of its proper divisors (1).

7215727213 is an equidigital number, since it uses as much as digits as its factorization.

7215727213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41160, while the sum is 37.

The square root of 7215727213 is about 84945.4366814369. The cubic root of 7215727213 is about 1932.3837150091.

The spelling of 7215727213 in words is "seven billion, two hundred fifteen million, seven hundred twenty-seven thousand, two hundred thirteen".