213224228 has 24 divisors (see below), whose sum is σ = 427207872. Its totient is φ = 91219104.

The previous prime is 213224201. The next prime is 213224243. The reversal of 213224228 is 822422312.

It is a junction number, because it is equal to n+sod(n) for n = 213224197 and 213224206.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9950 + ... + 22922.

It is an arithmetic number, because the mean of its divisors is an integer number (17800328).

Almost surely, 2^213224228 is an apocalyptic number.

213224228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

213224228 is an abundant number, since it is smaller than the sum of its proper divisors (213983644).

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

213224228 is a wasteful number, since it uses less digits than its factorization.

213224228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13571 (or 13569 counting only the distinct ones).

The product of its digits is 3072, while the sum is 26.

The square root of 213224228 is about 14602.1994233745. The cubic root of 213224228 is about 597.4187519292.

The spelling of 213224228 in words is "two hundred thirteen million, two hundred twenty-four thousand, two hundred twenty-eight".