Adding to 3212220 its reverse (222123), we get a palindrome (3434343).
3212220 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.
It is an Ulam number.
It is a congruent number.
It is an unprimeable number.
Almost surely, 23212220 is an apocalyptic number.
3212220 is a gapful number since it is divisible by the number (30) 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 3212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5096448).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
3212220 is a wasteful number, since it uses less digits than its factorization.
3212220 is an evil number, because the sum of its binary digits is even.
The square root of 3212220 is about 1792.2667212220. The cubic root of 3212220 is about 147.5486002828.
The spelling of 3212220 in words is "three million, two hundred twelve thousand, two hundred twenty".