23105543 has 2 divisors, whose sum is σ = 23105544. Its totient is φ = 23105542.

The previous prime is 23105531. The next prime is 23105549. The reversal of 23105543 is 34550132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23105543 - 2⁴ = 23105527 is a prime.

It is a super-2 number, since 2×23105543² = 1067732234649698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23105549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11552771 + 11552772.

It is an arithmetic number, because the mean of its divisors is an integer number (11552772).

Almost surely, 2^23105543 is an apocalyptic number.

23105543 is a deficient number, since it is larger than the sum of its proper divisors (1).

23105543 is an equidigital number, since it uses as much as digits as its factorization.

23105543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 23105543 is about 4806.8225471719. The cubic root of 23105543 is about 284.8210346621.

Adding to 23105543 its reverse (34550132), we get a palindrome (57655675).

It can be divided in two parts, 2310 and 5543, that multiplied together give a triangular number (12804330 = T₅₀₆₀).

The spelling of 23105543 in words is "twenty-three million, one hundred five thousand, five hundred forty-three".