22406563 has 4 divisors (see below), whose sum is σ = 22416880. Its totient is φ = 22396248.

The previous prime is 22406543. The next prime is 22406627. The reversal of 22406563 is 36560422.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22406563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22406513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 495 + ... + 6712.

It is an arithmetic number, because the mean of its divisors is an integer number (5604220).

Almost surely, 2^22406563 is an apocalyptic number.

22406563 is a deficient number, since it is larger than the sum of its proper divisors (10317).

22406563 is an equidigital number, since it uses as much as digits as its factorization.

22406563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10316.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 22406563 is about 4733.5571191230. The cubic root of 22406563 is about 281.9194772024.

Adding to 22406563 its reverse (36560422), we get a palindrome (58966985).

The spelling of 22406563 in words is "twenty-two million, four hundred six thousand, five hundred sixty-three".