7213212 has 72 divisors (see below), whose sum is σ = 19476912. Its totient is φ = 2332800.

The previous prime is 7213201. The next prime is 7213223. The reversal of 7213212 is 2123127.

It is an interprime number because it is at equal distance from previous prime (7213201) and next prime (7213223).

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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39762 + ... + 39942.

Almost surely, 2^7213212 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 7213212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9738456).

7213212 is an abundant number, since it is smaller than the sum of its proper divisors (12263700).

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

7213212 is a wasteful number, since it uses less digits than its factorization.

7213212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 227 counting only the distinct ones).

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

The square root of 7213212 is about 2685.7423554764. The cubic root of 7213212 is about 193.2159162845.

Adding to 7213212 its reverse (2123127), we get a palindrome (9336339).

The spelling of 7213212 in words is "seven million, two hundred thirteen thousand, two hundred twelve".