8100220 has 12 divisors (see below), whose sum is σ = 17010504. Its totient is φ = 3240080.

The previous prime is 8100217. The next prime is 8100227. The reversal of 8100220 is 220018.

It is a super-2 number, since 2×8100220² = 131227128096800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8100220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8100227) 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, 202486 + ... + 202525.

It is an arithmetic number, because the mean of its divisors is an integer number (1417542).

Almost surely, 2^8100220 is an apocalyptic number.

It is an amenable number.

8100220 is an abundant number, since it is smaller than the sum of its proper divisors (8910284).

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

8100220 is a wasteful number, since it uses less digits than its factorization.

8100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405020 (or 405018 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 8100220 is about 2846.0885439494. The cubic root of 8100220 is about 200.8317032211.

Adding to 8100220 its reverse (220018), we get a palindrome (8320238).

The spelling of 8100220 in words is "eight million, one hundred thousand, two hundred twenty".