7312212 has 18 divisors (see below), whose sum is σ = 18483738. Its totient is φ = 2437392.

The previous prime is 7312177. The next prime is 7312231. The reversal of 7312212 is 2122137.

It can be written as a sum of positive squares in only one way, i.e., 6320196 + 992016 = 2514^2 + 996^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101523 + ... + 101594.

Almost surely, 2^7312212 is an apocalyptic number.

It is an amenable number.

7312212 is an abundant number, since it is smaller than the sum of its proper divisors (11171526).

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

7312212 is a wasteful number, since it uses less digits than its factorization.

7312212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203127 (or 203122 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 7312212 is about 2704.1102048548. The cubic root of 7312212 is about 194.0958537193.

Adding to 7312212 its reverse (2122137), we get a palindrome (9434349).

The spelling of 7312212 in words is "seven million, three hundred twelve thousand, two hundred twelve".