8220518 has 8 divisors (see below), whose sum is σ = 12728640. Its totient is φ = 3977640.

The previous prime is 8220517. The next prime is 8220523. The reversal of 8220518 is 8150228.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8220517) 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, 66233 + ... + 66356.

It is an arithmetic number, because the mean of its divisors is an integer number (1591080).

Almost surely, 2^8220518 is an apocalyptic number.

8220518 is a deficient number, since it is larger than the sum of its proper divisors (4508122).

8220518 is a wasteful number, since it uses less digits than its factorization.

8220518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132622.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 8220518 is about 2867.1445725669. The cubic root of 8220518 is about 201.8210191242.

The spelling of 8220518 in words is "eight million, two hundred twenty thousand, five hundred eighteen".