7997215 has 16 divisors (see below), whose sum is σ = 10093248. Its totient is φ = 6071296.

The previous prime is 7997207. The next prime is 7997219. The reversal of 7997215 is 5127997.

It is a cyclic number.

It is not a de Polignac number, because 7997215 - 2³ = 7997207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7997219) 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 in 15 ways as a sum of consecutive naturals, for example, 22479 + ... + 22831.

It is an arithmetic number, because the mean of its divisors is an integer number (630828).

Almost surely, 2^7997215 is an apocalyptic number.

7997215 is a deficient number, since it is larger than the sum of its proper divisors (2096033).

7997215 is a wasteful number, since it uses less digits than its factorization.

7997215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578.

The product of its digits is 39690, while the sum is 40.

The square root of 7997215 is about 2827.9347587948. The cubic root of 7997215 is about 199.9767889730.

The spelling of 7997215 in words is "seven million, nine hundred ninety-seven thousand, two hundred fifteen".