9215997 has 32 divisors (see below), whose sum is σ = 14956800. Its totient is φ = 4935168.

The previous prime is 9215971. The next prime is 9216019. The reversal of 9215997 is 7995129.

It is not a de Polignac number, because 9215997 - 2⁶ = 9215933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9215497) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22329 + ... + 22737.

It is an arithmetic number, because the mean of its divisors is an integer number (467400).

Almost surely, 2^9215997 is an apocalyptic number.

It is an amenable number.

9215997 is a deficient number, since it is larger than the sum of its proper divisors (5740803).

9215997 is a wasteful number, since it uses less digits than its factorization.

9215997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485.

The product of its digits is 51030, while the sum is 42.

The square root of 9215997 is about 3035.7860596557. The cubic root of 9215997 is about 209.6592887872.

The spelling of 9215997 in words is "nine million, two hundred fifteen thousand, nine hundred ninety-seven".