22543020161 has 2 divisors, whose sum is σ = 22543020162. Its totient is φ = 22543020160.

The previous prime is 22543020067. The next prime is 22543020173. The reversal of 22543020161 is 16102034522.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22370885761 + 172134400 = 149569^2 + 13120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22543020161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22543020161.

It is not a weakly prime, because it can be changed into another prime (22543020361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11271510080 + 11271510081.

It is an arithmetic number, because the mean of its divisors is an integer number (11271510081).

Almost surely, 2^22543020161 is an apocalyptic number.

It is an amenable number.

22543020161 is a deficient number, since it is larger than the sum of its proper divisors (1).

22543020161 is an equidigital number, since it uses as much as digits as its factorization.

22543020161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 22543020161 its reverse (16102034522), we get a palindrome (38645054683).

The spelling of 22543020161 in words is "twenty-two billion, five hundred forty-three million, twenty thousand, one hundred sixty-one".