22052161 has 2 divisors, whose sum is σ = 22052162. Its totient is φ = 22052160.

The previous prime is 22052143. The next prime is 22052189. The reversal of 22052161 is 16125022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20647936 + 1404225 = 4544^2 + 1185^2 .

It is a cyclic number.

It is not a de Polignac number, because 22052161 - 2⁷ = 22052033 is a prime.

It is not a weakly prime, because it can be changed into another prime (22052131) 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 as a sum of consecutive naturals, namely, 11026080 + 11026081.

It is an arithmetic number, because the mean of its divisors is an integer number (11026081).

Almost surely, 2^22052161 is an apocalyptic number.

It is an amenable number.

22052161 is a deficient number, since it is larger than the sum of its proper divisors (1).

22052161 is an equidigital number, since it uses as much as digits as its factorization.

22052161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 22052161 is about 4695.9728491549. The cubic root of 22052161 is about 280.4252085425.

Adding to 22052161 its reverse (16125022), we get a palindrome (38177183).

The spelling of 22052161 in words is "twenty-two million, fifty-two thousand, one hundred sixty-one".