23103561 has 16 divisors (see below), whose sum is σ = 35126784. Its totient is φ = 13380864.

The previous prime is 23103533. The next prime is 23103571. The reversal of 23103561 is 16530132.

It is not a de Polignac number, because 23103561 - 2⁷ = 23103433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23103511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16761 + ... + 18086.

It is an arithmetic number, because the mean of its divisors is an integer number (2195424).

Almost surely, 2^23103561 is an apocalyptic number.

It is an amenable number.

23103561 is a deficient number, since it is larger than the sum of its proper divisors (12023223).

23103561 is a wasteful number, since it uses less digits than its factorization.

23103561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34880.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 23103561 is about 4806.6163774531. The cubic root of 23103561 is about 284.8128904196.

Adding to 23103561 its reverse (16530132), we get a palindrome (39633693).

The spelling of 23103561 in words is "twenty-three million, one hundred three thousand, five hundred sixty-one".