7217216 has 28 divisors (see below), whose sum is σ = 14947392. Its totient is φ = 3451008.

The previous prime is 7217213. The next prime is 7217219. The reversal of 7217216 is 6127127.

It is an interprime number because it is at equal distance from previous prime (7217213) and next prime (7217219).

It is not an unprimeable number, because it can be changed into a prime (7217213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 980 + ... + 3923.

Almost surely, 2^7217216 is an apocalyptic number.

It is an amenable number.

7217216 is an abundant number, since it is smaller than the sum of its proper divisors (7730176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7217216 is a wasteful number, since it uses less digits than its factorization.

7217216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4938 (or 4928 counting only the distinct ones).

The product of its digits is 1176, while the sum is 26.

The square root of 7217216 is about 2686.4876698023. The cubic root of 7217216 is about 193.2516605746.

The spelling of 7217216 in words is "seven million, two hundred seventeen thousand, two hundred sixteen".