22421563 has 4 divisors (see below), whose sum is σ = 22455360. Its totient is φ = 22387768.

The previous prime is 22421561. The next prime is 22421569. The reversal of 22421563 is 36512422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36512422 = 2 ⋅18256211.

It is a cyclic number.

It is not a de Polignac number, because 22421563 - 2¹ = 22421561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22421561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15883 + ... + 17236.

It is an arithmetic number, because the mean of its divisors is an integer number (5613840).

Almost surely, 2^22421563 is an apocalyptic number.

22421563 is a deficient number, since it is larger than the sum of its proper divisors (33797).

22421563 is an equidigital number, since it uses as much as digits as its factorization.

22421563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33796.

The product of its digits is 2880, while the sum is 25.

The square root of 22421563 is about 4735.1412861709. The cubic root of 22421563 is about 281.9823731919.

Adding to 22421563 its reverse (36512422), we get a palindrome (58933985).

The spelling of 22421563 in words is "twenty-two million, four hundred twenty-one thousand, five hundred sixty-three".