22244521 has 4 divisors (see below), whose sum is σ = 23955652. Its totient is φ = 20533392.

The previous prime is 22244503. The next prime is 22244539. The reversal of 22244521 is 12544222.

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

It is an interprime number because it is at equal distance from previous prime (22244503) and next prime (22244539).

It can be written as a sum of positive squares in 2 ways, for example, as 12880921 + 9363600 = 3589^2 + 3060^2 .

It is a cyclic number.

It is not a de Polignac number, because 22244521 - 2⁹ = 22244009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22244492 and 22244501.

It is not an unprimeable number, because it can be changed into a prime (22244561) by changing a digit.

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, 855546 + ... + 855571.

It is an arithmetic number, because the mean of its divisors is an integer number (5988913).

Almost surely, 2^22244521 is an apocalyptic number.

It is an amenable number.

22244521 is a deficient number, since it is larger than the sum of its proper divisors (1711131).

22244521 is a wasteful number, since it uses less digits than its factorization.

22244521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1711130.

The product of its digits is 1280, while the sum is 22.

The square root of 22244521 is about 4716.4097574320. The cubic root of 22244521 is about 281.2382279188.

Adding to 22244521 its reverse (12544222), we get a palindrome (34788743).

The spelling of 22244521 in words is "twenty-two million, two hundred forty-four thousand, five hundred twenty-one".