22237222 has 16 divisors (see below), whose sum is σ = 39152160. Its totient is φ = 9272448.

The previous prime is 22237213. The next prime is 22237223. The reversal of 22237222 is 22273222.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22237193 and 22237202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22237223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20947 + ... + 21982.

It is an arithmetic number, because the mean of its divisors is an integer number (2447010).

Almost surely, 2^22237222 is an apocalyptic number.

22237222 is a deficient number, since it is larger than the sum of its proper divisors (16914938).

22237222 is a wasteful number, since it uses less digits than its factorization.

22237222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42975.

The product of its digits is 1344, while the sum is 22.

The square root of 22237222 is about 4715.6359062167. The cubic root of 22237222 is about 281.2074640528.

It can be divided in two parts, 2223722 and 2, that multiplied together give a palindrome (4447444).

The spelling of 22237222 in words is "twenty-two million, two hundred thirty-seven thousand, two hundred twenty-two".