9161215 has 32 divisors (see below), whose sum is σ = 13530240. Its totient is φ = 5812224.

The previous prime is 9161203. The next prime is 9161219. The reversal of 9161215 is 5121619.

It is a cyclic number.

It is not a de Polignac number, because 9161215 - 2⁵ = 9161183 is a prime.

9161215 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9161215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9161219) 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, 52869 + ... + 53041.

It is an arithmetic number, because the mean of its divisors is an integer number (422820).

Almost surely, 2^9161215 is an apocalyptic number.

9161215 is a deficient number, since it is larger than the sum of its proper divisors (4369025).

9161215 is a wasteful number, since it uses less digits than its factorization.

9161215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291.

The product of its digits is 540, while the sum is 25.

The square root of 9161215 is about 3026.7499070785. The cubic root of 9161215 is about 209.2430419719.

The spelling of 9161215 in words is "nine million, one hundred sixty-one thousand, two hundred fifteen".