8218255 has 16 divisors (see below), whose sum is σ = 10462464. Its totient is φ = 6186240.

The previous prime is 8218253. The next prime is 8218277. The reversal of 8218255 is 5528128.

It is not a de Polignac number, because 8218255 - 2¹ = 8218253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

8218255 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8218253) 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, 5019 + ... + 6451.

It is an arithmetic number, because the mean of its divisors is an integer number (653904).

Almost surely, 2^8218255 is an apocalyptic number.

8218255 is a deficient number, since it is larger than the sum of its proper divisors (2244209).

8218255 is a wasteful number, since it uses less digits than its factorization.

8218255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506.

The product of its digits is 6400, while the sum is 31.

The square root of 8218255 is about 2866.7499018924. The cubic root of 8218255 is about 201.8024978712.

The spelling of 8218255 in words is "eight million, two hundred eighteen thousand, two hundred fifty-five".