210006220 has 12 divisors (see below), whose sum is σ = 441013104. Its totient is φ = 84002480.

The previous prime is 210006217. The next prime is 210006227. The reversal of 210006220 is 22600012.

It is a happy number.

It is a super-2 number, since 2×210006220² = 88205224877376800, 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 210006220.

It is not an unprimeable number, because it can be changed into a prime (210006227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5250136 + ... + 5250175.

It is an arithmetic number, because the mean of its divisors is an integer number (36751092).

Almost surely, 2^210006220 is an apocalyptic number.

210006220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210006220 is an abundant number, since it is smaller than the sum of its proper divisors (231006884).

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

210006220 is a wasteful number, since it uses less digits than its factorization.

210006220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10500320 (or 10500318 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 210006220 is about 14491.5913549893. The cubic root of 210006220 is about 594.3980636620.

Adding to 210006220 its reverse (22600012), we get a palindrome (232606232).

The spelling of 210006220 in words is "two hundred ten million, six thousand, two hundred twenty".