22001244 has 12 divisors (see below), whose sum is σ = 51336264. Its totient is φ = 7333744.

The previous prime is 22001237. The next prime is 22001261. The reversal of 22001244 is 44210022.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 916707 + ... + 916730.

It is an arithmetic number, because the mean of its divisors is an integer number (4278022).

Almost surely, 2^22001244 is an apocalyptic number.

It is an amenable number.

22001244 is an abundant number, since it is smaller than the sum of its proper divisors (29335020).

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

22001244 is a wasteful number, since it uses less digits than its factorization.

22001244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833444 (or 1833442 counting only the distinct ones).

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

The square root of 22001244 is about 4690.5483687944. The cubic root of 22001244 is about 280.2092143856.

Adding to 22001244 its reverse (44210022), we get a palindrome (66211266).

The spelling of 22001244 in words is "twenty-two million, one thousand, two hundred forty-four".