8219915 has 16 divisors (see below), whose sum is σ = 10872576. Its totient is φ = 5916000.

The previous prime is 8219909. The next prime is 8219917. The reversal of 8219915 is 5199128.

It is not a de Polignac number, because 8219915 - 2⁴ = 8219899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8219917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4940 + ... + 6390.

It is an arithmetic number, because the mean of its divisors is an integer number (679536).

Almost surely, 2^8219915 is an apocalyptic number.

8219915 is a deficient number, since it is larger than the sum of its proper divisors (2652661).

8219915 is a wasteful number, since it uses less digits than its factorization.

8219915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570.

The product of its digits is 6480, while the sum is 35.

The square root of 8219915 is about 2867.0394137507. The cubic root of 8219915 is about 201.8160842750.

The spelling of 8219915 in words is "eight million, two hundred nineteen thousand, nine hundred fifteen".