22531543 has 2 divisors, whose sum is σ = 22531544. Its totient is φ = 22531542.

The previous prime is 22531493. The next prime is 22531547. The reversal of 22531543 is 34513522.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22531543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22531547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11265771 + 11265772.

It is an arithmetic number, because the mean of its divisors is an integer number (11265772).

Almost surely, 2^22531543 is an apocalyptic number.

22531543 is a deficient number, since it is larger than the sum of its proper divisors (1).

22531543 is an equidigital number, since it uses as much as digits as its factorization.

22531543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 25.

The square root of 22531543 is about 4746.7402498978. The cubic root of 22531543 is about 282.4426719498.

The spelling of 22531543 in words is "twenty-two million, five hundred thirty-one thousand, five hundred forty-three".