203212220 has 96 divisors (see below), whose sum is σ = 482630400. Its totient is φ = 71414784.

The previous prime is 203212211. The next prime is 203212241. The reversal of 203212220 is 22212302.

203212220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 203212195 and 203212204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 535991 + ... + 536369.

It is an arithmetic number, because the mean of its divisors is an integer number (5027400).

Almost surely, 2^203212220 is an apocalyptic number.

203212220 is a gapful number since it is divisible by the number (20) 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 203212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241315200).

203212220 is an abundant number, since it is smaller than the sum of its proper divisors (279418180).

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

203212220 is a wasteful number, since it uses less digits than its factorization.

203212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507 (or 505 counting only the distinct ones).

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

The square root of 203212220 is about 14255.2523653564. The cubic root of 203212220 is about 587.9177966747.

Adding to 203212220 its reverse (22212302), we get a palindrome (225424522).

The spelling of 203212220 in words is "two hundred three million, two hundred twelve thousand, two hundred twenty".