6997215 has 16 divisors (see below), whose sum is σ = 11258208. Its totient is φ = 3710976.

The previous prime is 6997213. The next prime is 6997229. The reversal of 6997215 is 5127996.

It is not a de Polignac number, because 6997215 - 2¹ = 6997213 is a prime.

It is a super-2 number, since 2×6997215² = 97922035512450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6997213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1687 + ... + 4103.

It is an arithmetic number, because the mean of its divisors is an integer number (703638).

Almost surely, 2^6997215 is an apocalyptic number.

6997215 is a deficient number, since it is larger than the sum of its proper divisors (4260993).

6997215 is a wasteful number, since it uses less digits than its factorization.

6997215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618.

The product of its digits is 34020, while the sum is 39.

The square root of 6997215 is about 2645.2249431759. The cubic root of 6997215 is about 191.2677458009.

The spelling of 6997215 in words is "six million, nine hundred ninety-seven thousand, two hundred fifteen".