7215797 has 2 divisors, whose sum is σ = 7215798. Its totient is φ = 7215796.

The previous prime is 7215779. The next prime is 7215811. The reversal of 7215797 is 7975127.

Together with previous prime (7215779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7107556 + 108241 = 2666^2 + 329^2 .

It is a cyclic number.

It is not a de Polignac number, because 7215797 - 2¹⁰ = 7214773 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7215797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7215697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3607898 + 3607899.

It is an arithmetic number, because the mean of its divisors is an integer number (3607899).

Almost surely, 2^7215797 is an apocalyptic number.

It is an amenable number.

7215797 is a deficient number, since it is larger than the sum of its proper divisors (1).

7215797 is an equidigital number, since it uses as much as digits as its factorization.

7215797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30870, while the sum is 38.

The square root of 7215797 is about 2686.2235573384. The cubic root of 7215797 is about 193.2389944680.

The spelling of 7215797 in words is "seven million, two hundred fifteen thousand, seven hundred ninety-seven".