22943561 has 2 divisors, whose sum is σ = 22943562. Its totient is φ = 22943560.

The previous prime is 22943551. The next prime is 22943573. The reversal of 22943561 is 16534922.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22231225 + 712336 = 4715^2 + 844^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22943561 is a prime.

It is a super-3 number, since 3×22943561³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22943551) 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, 11471780 + 11471781.

It is an arithmetic number, because the mean of its divisors is an integer number (11471781).

Almost surely, 2^22943561 is an apocalyptic number.

It is an amenable number.

22943561 is a deficient number, since it is larger than the sum of its proper divisors (1).

22943561 is an equidigital number, since it uses as much as digits as its factorization.

22943561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 22943561 is about 4789.9437366215. The cubic root of 22943561 is about 284.1538915013.

The spelling of 22943561 in words is "twenty-two million, nine hundred forty-three thousand, five hundred sixty-one".