22543429 has 2 divisors, whose sum is σ = 22543430. Its totient is φ = 22543428.

The previous prime is 22543393. The next prime is 22543441. The reversal of 22543429 is 92434522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18258529 + 4284900 = 4273^2 + 2070^2 .

It is a cyclic number.

It is not a de Polignac number, because 22543429 - 2⁹ = 22542917 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22543429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22543529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11271714 + 11271715.

It is an arithmetic number, because the mean of its divisors is an integer number (11271715).

Almost surely, 2^22543429 is an apocalyptic number.

It is an amenable number.

22543429 is a deficient number, since it is larger than the sum of its proper divisors (1).

22543429 is an equidigital number, since it uses as much as digits as its factorization.

22543429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 31.

The square root of 22543429 is about 4747.9921019311. The cubic root of 22543429 is about 282.4923286089.

The spelling of 22543429 in words is "twenty-two million, five hundred forty-three thousand, four hundred twenty-nine".