23201543 has 2 divisors, whose sum is σ = 23201544. Its totient is φ = 23201542.

The previous prime is 23201539. The next prime is 23201557. The reversal of 23201543 is 34510232.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23201543 - 2² = 23201539 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23201513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11600771 + 11600772.

It is an arithmetic number, because the mean of its divisors is an integer number (11600772).

Almost surely, 2^23201543 is an apocalyptic number.

23201543 is a deficient number, since it is larger than the sum of its proper divisors (1).

23201543 is an equidigital number, since it uses as much as digits as its factorization.

23201543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 23201543 is about 4816.7980028230. The cubic root of 23201543 is about 285.2149522325.

Adding to 23201543 its reverse (34510232), we get a palindrome (57711775).

The spelling of 23201543 in words is "twenty-three million, two hundred one thousand, five hundred forty-three".