It is a nude number because it is divisible by every one of its digits.
It is a congruent number.
2312222 is an apocalyptic number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
312222 is a wasteful number, since it uses less digits than its factorization.
312222 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3083.
The square root of 312222 is about 558.7682882913. The cubic root of 312222 is about 67.8403115622.
Adding to 312222 its reverse (222213), we get a palindrome (534435).
Subtracting from 312222 its reverse (222213), we obtain a palindrome (90009).
The spelling of 312222 in words is "three hundred twelve thousand, two hundred twenty-two", and thus it is an iban number.