22422021 has 16 divisors (see below), whose sum is σ = 31449600. Its totient is φ = 14189760.

The previous prime is 22422007. The next prime is 22422041. The reversal of 22422021 is 12022422.

It is not a de Polignac number, because 22422021 - 2¹⁰ = 22420997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22422041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2655 + ... + 7203.

It is an arithmetic number, because the mean of its divisors is an integer number (1965600).

Almost surely, 2^22422021 is an apocalyptic number.

It is an amenable number.

22422021 is a deficient number, since it is larger than the sum of its proper divisors (9027579).

22422021 is a wasteful number, since it uses less digits than its factorization.

22422021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4636.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 22422021 is about 4735.1896477332. The cubic root of 22422021 is about 281.9842931748.

Adding to 22422021 its reverse (12022422), we get a palindrome (34444443).

The spelling of 22422021 in words is "twenty-two million, four hundred twenty-two thousand, twenty-one".