22170442 has 36 divisors (see below), whose sum is σ = 40214070. Its totient is φ = 9139872.

The previous prime is 22170439. The next prime is 22170443. The reversal of 22170442 is 24407122.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 14447601 + 7722841 = 3801^2 + 2779^2 .

It is not an unprimeable number, because it can be changed into a prime (22170443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 82284 + ... + 82552.

Almost surely, 2^22170442 is an apocalyptic number.

22170442 is a deficient number, since it is larger than the sum of its proper divisors (18043628).

22170442 is a wasteful number, since it uses less digits than its factorization.

22170442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 22170442 is about 4708.5498829257. The cubic root of 22170442 is about 280.9256862878.

Adding to 22170442 its reverse (24407122), we get a palindrome (46577564).

The spelling of 22170442 in words is "twenty-two million, one hundred seventy thousand, four hundred forty-two".