7212212 has 36 divisors (see below), whose sum is σ = 15168384. Its totient is φ = 2988720.

The previous prime is 7212211. The next prime is 7212239. The reversal of 7212212 is 2122127.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7212211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5483 + ... + 6669.

It is an arithmetic number, because the mean of its divisors is an integer number (421344).

Almost surely, 2^7212212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7212212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7584192).

7212212 is an abundant number, since it is smaller than the sum of its proper divisors (7956172).

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

7212212 is a wasteful number, since it uses less digits than its factorization.

7212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236 (or 1227 counting only the distinct ones).

The product of its digits is 112, while the sum is 17.

The square root of 7212212 is about 2685.5561807566. The cubic root of 7212212 is about 193.2069870749.

Adding to 7212212 its reverse (2122127), we get a palindrome (9334339).

The spelling of 7212212 in words is "seven million, two hundred twelve thousand, two hundred twelve".