212203220 has 24 divisors (see below), whose sum is σ = 445943904. Its totient is φ = 84820896.

The previous prime is 212203193. The next prime is 212203223. The reversal of 212203220 is 22302212.

212203220 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

212203220 is strictly pandigital in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 212203195 and 212203204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212203223) 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, 34499 + ... + 40181.

It is an arithmetic number, because the mean of its divisors is an integer number (18580996).

Almost surely, 2^212203220 is an apocalyptic number.

212203220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212203220 is an abundant number, since it is smaller than the sum of its proper divisors (233740684).

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

212203220 is a wasteful number, since it uses less digits than its factorization.

212203220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7559 (or 7557 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 212203220 is about 14567.1967104176. The cubic root of 212203220 is about 596.4636610900.

Adding to 212203220 its reverse (22302212), we get a palindrome (234505432).

The spelling of 212203220 in words is "two hundred twelve million, two hundred three thousand, two hundred twenty".