2100220 has 24 divisors (see below), whose sum is σ = 4443264. Its totient is φ = 833856.

The previous prime is 2100193. The next prime is 2100221. The reversal of 2100220 is 220012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3157 + ... + 3763.

It is an arithmetic number, because the mean of its divisors is an integer number (185136).

2^2100220 is an apocalyptic number.

2100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100220 is an abundant number, since it is smaller than the sum of its proper divisors (2343044).

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

2100220 is a wasteful number, since it uses less digits than its factorization.

2100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789 (or 787 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 2100220 is about 1449.2135798425. The cubic root of 2100220 is about 128.0623882063.

Adding to 2100220 its reverse (220012), we get a palindrome (2320232).

The spelling of 2100220 in words is "two million, one hundred thousand, two hundred twenty".