7212220 has 12 divisors (see below), whose sum is σ = 15145704. Its totient is φ = 2884880.

The previous prime is 7212211. The next prime is 7212239. The reversal of 7212220 is 222127.

It is a super-2 number, since 2×7212220² = 104032234656800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7212194 and 7212203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180286 + ... + 180325.

It is an arithmetic number, because the mean of its divisors is an integer number (1262142).

Almost surely, 2^7212220 is an apocalyptic number.

It is an amenable number.

7212220 is an abundant number, since it is smaller than the sum of its proper divisors (7933484).

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

7212220 is a wasteful number, since it uses less digits than its factorization.

7212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360620 (or 360618 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 7212220 is about 2685.5576702056. The cubic root of 7212220 is about 193.2070585119.

Adding to 7212220 its reverse (222127), we get a palindrome (7434347).

The spelling of 7212220 in words is "seven million, two hundred twelve thousand, two hundred twenty".