22530401 has 4 divisors (see below), whose sum is σ = 22627332. Its totient is φ = 22433472.

The previous prime is 22530379. The next prime is 22530449. The reversal of 22530401 is 10403522.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5058001 + 17472400 = 2249^2 + 4180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22530401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22530401.

It is not an unprimeable number, because it can be changed into a prime (22530451) 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, 48116 + ... + 48581.

It is an arithmetic number, because the mean of its divisors is an integer number (5656833).

Almost surely, 2^22530401 is an apocalyptic number.

It is an amenable number.

22530401 is a deficient number, since it is larger than the sum of its proper divisors (96931).

22530401 is an equidigital number, since it uses as much as digits as its factorization.

22530401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96930.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 22530401 is about 4746.6199552945. The cubic root of 22530401 is about 282.4379000472.

Adding to 22530401 its reverse (10403522), we get a palindrome (32933923).

The spelling of 22530401 in words is "twenty-two million, five hundred thirty thousand, four hundred one".