312212212 has 48 divisors (see below), whose sum is σ = 629056512. Its totient is φ = 134449920.

The previous prime is 312212183. The next prime is 312212221. The reversal of 312212212 is 212212213.

It is a happy number.

312212212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45853 + ... + 52219.

It is an arithmetic number, because the mean of its divisors is an integer number (13105344).

Almost surely, 2^312212212 is an apocalyptic number.

It is an amenable number.

312212212 is an abundant number, since it is smaller than the sum of its proper divisors (316844300).

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

312212212 is a wasteful number, since it uses less digits than its factorization.

312212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6448 (or 6446 counting only the distinct ones).

The product of its digits is 96, while the sum is 16.

The square root of 312212212 is about 17669.5277809001. The cubic root of 312212212 is about 678.3960263512.

Adding to 312212212 its reverse (212212213), we get a palindrome (524424425).

Subtracting from 312212212 its reverse (212212213), we obtain a palindrome (99999999).

It can be divided in two parts, 31221 and 2212, that added together give a palindrome (33433).

The spelling of 312212212 in words is "three hundred twelve million, two hundred twelve thousand, two hundred twelve".