7222236 has 48 divisors (see below), whose sum is σ = 19439616. Its totient is φ = 2044224.

The previous prime is 7222219. The next prime is 7222279. The reversal of 7222236 is 6322227.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10330 + ... + 11006.

It is an arithmetic number, because the mean of its divisors is an integer number (404992).

Almost surely, 2^7222236 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 7222236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9719808).

7222236 is an abundant number, since it is smaller than the sum of its proper divisors (12217380).

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

7222236 is a wasteful number, since it uses less digits than its factorization.

7222236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818 (or 816 counting only the distinct ones).

The product of its digits is 2016, while the sum is 24.

The square root of 7222236 is about 2687.4218128161. The cubic root of 7222236 is about 193.2964561715.

Subtracting from 7222236 its reverse (6322227), we obtain a palindrome (900009).

The spelling of 7222236 in words is "seven million, two hundred twenty-two thousand, two hundred thirty-six".