22305521 has 8 divisors (see below), whose sum is σ = 25522944. Its totient is φ = 19095840.

The previous prime is 22305511. The next prime is 22305529. The reversal of 22305521 is 12550322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22305521 - 2⁶ = 22305457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22305493 and 22305502.

It is not an unprimeable number, because it can be changed into a prime (22305529) 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 7 ways as a sum of consecutive naturals, for example, 7016 + ... + 9686.

It is an arithmetic number, because the mean of its divisors is an integer number (3190368).

Almost surely, 2^22305521 is an apocalyptic number.

It is an amenable number.

22305521 is a deficient number, since it is larger than the sum of its proper divisors (3217423).

22305521 is a wasteful number, since it uses less digits than its factorization.

22305521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3871.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 22305521 is about 4722.8721134496. The cubic root of 22305521 is about 281.4950683062.

Adding to 22305521 its reverse (12550322), we get a palindrome (34855843).

The spelling of 22305521 in words is "twenty-two million, three hundred five thousand, five hundred twenty-one".