7222220 has 12 divisors (see below), whose sum is σ = 15166704. Its totient is φ = 2888880.

The previous prime is 7222219. The next prime is 7222279. The reversal of 7222220 is 222227.

It is a nialpdrome in base 10.

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 3 ways as a sum of consecutive naturals, for example, 180536 + ... + 180575.

It is an arithmetic number, because the mean of its divisors is an integer number (1263892).

Almost surely, 2^7222220 is an apocalyptic number.

It is an amenable number.

7222220 is an abundant number, since it is smaller than the sum of its proper divisors (7944484).

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

7222220 is a wasteful number, since it uses less digits than its factorization.

7222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361120 (or 361118 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 7222220 is about 2687.4188359837. The cubic root of 7222220 is about 193.2963134297.

Adding to 7222220 its reverse (222227), we get a palindrome (7444447).

The spelling of 7222220 in words is "seven million, two hundred twenty-two thousand, two hundred twenty".