8221516 has 12 divisors (see below), whose sum is σ = 14590800. Its totient is φ = 4052720.

The previous prime is 8221513. The next prime is 8221537. The reversal of 8221516 is 6151228.

It is not an unprimeable number, because it can be changed into a prime (8221513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14191 + ... + 14758.

It is an arithmetic number, because the mean of its divisors is an integer number (1215900).

Almost surely, 2^8221516 is an apocalyptic number.

It is an amenable number.

8221516 is a deficient number, since it is larger than the sum of its proper divisors (6369284).

8221516 is a wasteful number, since it uses less digits than its factorization.

8221516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29024 (or 29022 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 8221516 is about 2867.3186080378. The cubic root of 8221516 is about 201.8291860559.

The spelling of 8221516 in words is "eight million, two hundred twenty-one thousand, five hundred sixteen".