23481563 has 4 divisors (see below), whose sum is σ = 26836080. Its totient is φ = 20127048.

The previous prime is 23481559. The next prime is 23481581. The reversal of 23481563 is 36518432.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23481563 - 2² = 23481559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23481553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1677248 + ... + 1677261.

It is an arithmetic number, because the mean of its divisors is an integer number (6709020).

Almost surely, 2^23481563 is an apocalyptic number.

23481563 is a deficient number, since it is larger than the sum of its proper divisors (3354517).

23481563 is an equidigital number, since it uses as much as digits as its factorization.

23481563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3354516.

The product of its digits is 17280, while the sum is 32.

The square root of 23481563 is about 4845.7778529355. Note that the first 3 decimals coincide. The cubic root of 23481563 is about 286.3577889672.

Adding to 23481563 its reverse (36518432), we get a palindrome (59999995).

The spelling of 23481563 in words is "twenty-three million, four hundred eighty-one thousand, five hundred sixty-three".