22661201 has 2 divisors, whose sum is σ = 22661202. Its totient is φ = 22661200.

The previous prime is 22661173. The next prime is 22661207. The reversal of 22661201 is 10216622.

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., 22137025 + 524176 = 4705^2 + 724^2 .

It is a cyclic number.

It is not a de Polignac number, because 22661201 - 2⁶ = 22661137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22661207) 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, 11330600 + 11330601.

It is an arithmetic number, because the mean of its divisors is an integer number (11330601).

Almost surely, 2^22661201 is an apocalyptic number.

It is an amenable number.

22661201 is a deficient number, since it is larger than the sum of its proper divisors (1).

22661201 is an equidigital number, since it uses as much as digits as its factorization.

22661201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 22661201 is about 4760.3782412745. The cubic root of 22661201 is about 282.9834091503.

Adding to 22661201 its reverse (10216622), we get a palindrome (32877823).

The spelling of 22661201 in words is "twenty-two million, six hundred sixty-one thousand, two hundred one".