22001224 has 16 divisors (see below), whose sum is σ = 47145600. Its totient is φ = 9429072.

The previous prime is 22001209. The next prime is 22001237. The reversal of 22001224 is 42210022.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196384 + ... + 196495.

It is an arithmetic number, because the mean of its divisors is an integer number (2946600).

Almost surely, 2^22001224 is an apocalyptic number.

It is an amenable number.

22001224 is an abundant number, since it is smaller than the sum of its proper divisors (25144376).

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

22001224 is a wasteful number, since it uses less digits than its factorization.

22001224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392892 (or 392888 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 22001224 is about 4690.5462368470. The cubic root of 22001224 is about 280.2091294785.

Adding to 22001224 its reverse (42210022), we get a palindrome (64211246).

The spelling of 22001224 in words is "twenty-two million, one thousand, two hundred twenty-four".