23563541 has 4 divisors (see below), whose sum is σ = 23584032. Its totient is φ = 23543052.

The previous prime is 23563517. The next prime is 23563549. The reversal of 23563541 is 14536532.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23563541 - 2¹⁴ = 23547157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23563549) 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 in 3 ways as a sum of consecutive naturals, for example, 8411 + ... + 10856.

It is an arithmetic number, because the mean of its divisors is an integer number (5896008).

Almost surely, 2^23563541 is an apocalyptic number.

It is an amenable number.

23563541 is a deficient number, since it is larger than the sum of its proper divisors (20491).

23563541 is a wasteful number, since it uses less digits than its factorization.

23563541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20490.

The product of its digits is 10800, while the sum is 29.

The square root of 23563541 is about 4854.2291870080. The cubic root of 23563541 is about 286.6906426374.

The spelling of 23563541 in words is "twenty-three million, five hundred sixty-three thousand, five hundred forty-one".