213222220 has 12 divisors (see below), whose sum is σ = 447766704. Its totient is φ = 85288880.

The previous prime is 213222197. The next prime is 213222223. The reversal of 213222220 is 22222312.

It is a junction number, because it is equal to n+sod(n) for n = 213222194 and 213222203.

It is not an unprimeable number, because it can be changed into a prime (213222223) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5330536 + ... + 5330575.

It is an arithmetic number, because the mean of its divisors is an integer number (37313892).

Almost surely, 2^213222220 is an apocalyptic number.

213222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213222220 is an abundant number, since it is smaller than the sum of its proper divisors (234544484).

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

213222220 is a wasteful number, since it uses less digits than its factorization.

213222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10661120 (or 10661118 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 213222220 is about 14602.1306664473. The cubic root of 213222220 is about 597.4168765629.

Adding to 213222220 its reverse (22222312), we get a palindrome (235444532).

The spelling of 213222220 in words is "two hundred thirteen million, two hundred twenty-two thousand, two hundred twenty".