22073561 has 2 divisors, whose sum is σ = 22073562. Its totient is φ = 22073560.

The previous prime is 22073543. The next prime is 22073563. The reversal of 22073561 is 16537022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14478025 + 7595536 = 3805^2 + 2756^2 .

It is a cyclic number.

It is not a de Polignac number, because 22073561 - 2¹⁰ = 22072537 is a prime.

It is a Sophie Germain prime.

Together with 22073563, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22073561.

It is not a weakly prime, because it can be changed into another prime (22073563) 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, 11036780 + 11036781.

It is an arithmetic number, because the mean of its divisors is an integer number (11036781).

Almost surely, 2^22073561 is an apocalyptic number.

It is an amenable number.

22073561 is a deficient number, since it is larger than the sum of its proper divisors (1).

22073561 is an equidigital number, since it uses as much as digits as its factorization.

22073561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 22073561 is about 4698.2508447293. The cubic root of 22073561 is about 280.5158898941.

The spelling of 22073561 in words is "twenty-two million, seventy-three thousand, five hundred sixty-one".