206221224 has 64 divisors (see below), whose sum is σ = 568290240. Its totient is φ = 61839360.

The previous prime is 206221201. The next prime is 206221229. The reversal of 206221224 is 422122602.

206221224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 206221224.

It is not an unprimeable number, because it can be changed into a prime (206221229) 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, 21582 + ... + 29634.

It is an arithmetic number, because the mean of its divisors is an integer number (8879535).

Almost surely, 2^206221224 is an apocalyptic number.

206221224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206221224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284145120).

206221224 is an abundant number, since it is smaller than the sum of its proper divisors (362069016).

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

206221224 is a wasteful number, since it uses less digits than its factorization.

206221224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8170 (or 8166 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 206221224 is about 14360.4047296725. The cubic root of 206221224 is about 590.8053962882.

Adding to 206221224 its reverse (422122602), we get a palindrome (628343826).

The spelling of 206221224 in words is "two hundred six million, two hundred twenty-one thousand, two hundred twenty-four".