22781222 has 8 divisors (see below), whose sum is σ = 34197336. Its totient is φ = 11382112.

The previous prime is 22781221. The next prime is 22781261. The reversal of 22781222 is 22218722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 22781191 and 22781200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22781221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83 + ... + 6750.

It is an arithmetic number, because the mean of its divisors is an integer number (4274667).

Almost surely, 2^22781222 is an apocalyptic number.

22781222 is a deficient number, since it is larger than the sum of its proper divisors (11416114).

22781222 is a wasteful number, since it uses less digits than its factorization.

22781222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8502.

The product of its digits is 1792, while the sum is 26.

The square root of 22781222 is about 4772.9678398246. The cubic root of 22781222 is about 283.4821200854.

Adding to 22781222 its reverse (22218722), we get a palindrome (44999944).

Subtracting from 22781222 its reverse (22218722), we obtain a square (562500 = 750²).

The spelling of 22781222 in words is "twenty-two million, seven hundred eighty-one thousand, two hundred twenty-two".