22516222 has 16 divisors (see below), whose sum is σ = 34327440. Its totient is φ = 11075328.

The previous prime is 22516213. The next prime is 22516237. The reversal of 22516222 is 22261522.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22516193 and 22516202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53529 + ... + 53947.

It is an arithmetic number, because the mean of its divisors is an integer number (2145465).

Almost surely, 2^22516222 is an apocalyptic number.

22516222 is a deficient number, since it is larger than the sum of its proper divisors (11811218).

22516222 is a wasteful number, since it uses less digits than its factorization.

22516222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795.

The product of its digits is 960, while the sum is 22.

The square root of 22516222 is about 4745.1261310949. The cubic root of 22516222 is about 282.3786389720.

Adding to 22516222 its reverse (22261522), we get a palindrome (44777744).

The spelling of 22516222 in words is "twenty-two million, five hundred sixteen thousand, two hundred twenty-two".