22021242 has 16 divisors (see below), whose sum is σ = 44455392. Its totient is φ = 7271600.

The previous prime is 22021229. The next prime is 22021249. The reversal of 22021242 is 24212022.

It is not an unprimeable number, because it can be changed into a prime (22021249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16509 + ... + 17792.

It is an arithmetic number, because the mean of its divisors is an integer number (2778462).

Almost surely, 2^22021242 is an apocalyptic number.

22021242 is an abundant number, since it is smaller than the sum of its proper divisors (22434150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22021242 is a wasteful number, since it uses less digits than its factorization.

22021242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34413.

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

The square root of 22021242 is about 4692.6796182991. The cubic root of 22021242 is about 280.2940872671.

Adding to 22021242 its reverse (24212022), we get a palindrome (46233264).

The spelling of 22021242 in words is "twenty-two million, twenty-one thousand, two hundred forty-two".