22644242 has 4 divisors (see below), whose sum is σ = 33966366. Its totient is φ = 11322120.

The previous prime is 22644217. The next prime is 22644247. The reversal of 22644242 is 24244622.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11826721 + 10817521 = 3439^2 + 3289^2 .

It is not an unprimeable number, because it can be changed into a prime (22644247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5661059 + ... + 5661062.

Almost surely, 2^22644242 is an apocalyptic number.

22644242 is a deficient number, since it is larger than the sum of its proper divisors (11322124).

22644242 is a wasteful number, since it uses less digits than its factorization.

22644242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11322123.

The product of its digits is 6144, while the sum is 26.

The square root of 22644242 is about 4758.5966418683. The cubic root of 22644242 is about 282.9127992812.

Adding to 22644242 its reverse (24244622), we get a palindrome (46888864).

The spelling of 22644242 in words is "twenty-two million, six hundred forty-four thousand, two hundred forty-two".