22454521 has 4 divisors (see below), whose sum is σ = 22464000. Its totient is φ = 22445044.

The previous prime is 22454519. The next prime is 22454567. The reversal of 22454521 is 12545422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22454521 - 2¹ = 22454519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22454591) 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, 2280 + ... + 7078.

It is an arithmetic number, because the mean of its divisors is an integer number (5616000).

Almost surely, 2^22454521 is an apocalyptic number.

It is an amenable number.

22454521 is a deficient number, since it is larger than the sum of its proper divisors (9479).

22454521 is an equidigital number, since it uses as much as digits as its factorization.

22454521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9478.

The product of its digits is 3200, while the sum is 25.

The square root of 22454521 is about 4738.6201578097. The cubic root of 22454521 is about 282.1204697964.

Adding to 22454521 its reverse (12545422), we get a palindrome (34999943).

Subtracting from 22454521 its reverse (12545422), we obtain a palindrome (9909099).

It can be divided in two parts, 224 and 54521, that added together give a palindrome (54745).

The spelling of 22454521 in words is "twenty-two million, four hundred fifty-four thousand, five hundred twenty-one".