22530161 has 2 divisors, whose sum is σ = 22530162. Its totient is φ = 22530160.

The previous prime is 22530139. The next prime is 22530163. The reversal of 22530161 is 16103522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11771761 + 10758400 = 3431^2 + 3280^2 .

It is a cyclic number.

It is not a de Polignac number, because 22530161 - 2⁶ = 22530097 is a prime.

Together with 22530163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22530163) 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 as a sum of consecutive naturals, namely, 11265080 + 11265081.

It is an arithmetic number, because the mean of its divisors is an integer number (11265081).

Almost surely, 2^22530161 is an apocalyptic number.

It is an amenable number.

22530161 is a deficient number, since it is larger than the sum of its proper divisors (1).

22530161 is an equidigital number, since it uses as much as digits as its factorization.

22530161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 22530161 is about 4746.5946740795. The cubic root of 22530161 is about 282.4368971751.

Adding to 22530161 its reverse (16103522), we get a palindrome (38633683).

The spelling of 22530161 in words is "twenty-two million, five hundred thirty thousand, one hundred sixty-one".