8165220 has 48 divisors (see below), whose sum is σ = 26130048. Its totient is φ = 1866240.

The previous prime is 8165149. The next prime is 8165221. The reversal of 8165220 is 225618.

It is not an unprimeable number, because it can be changed into a prime (8165221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9301 + ... + 10140.

It is an arithmetic number, because the mean of its divisors is an integer number (544376).

Almost surely, 2^8165220 is an apocalyptic number.

It is an amenable number.

8165220 is an abundant number, since it is smaller than the sum of its proper divisors (17964828).

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

8165220 is a wasteful number, since it uses less digits than its factorization.

8165220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19460 (or 19458 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 8165220 is about 2857.4849080966. The cubic root of 8165220 is about 201.3674622591.

It can be divided in two parts, 8165 and 220, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 8165220 in words is "eight million, one hundred sixty-five thousand, two hundred twenty".