23112561 has 8 divisors (see below), whose sum is σ = 31568544. Its totient is φ = 15032480.

The previous prime is 23112553. The next prime is 23112563. The reversal of 23112561 is 16521132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23112561 - 2³ = 23112553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23112563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93831 + ... + 94076.

It is an arithmetic number, because the mean of its divisors is an integer number (3946068).

Almost surely, 2^23112561 is an apocalyptic number.

It is an amenable number.

23112561 is a deficient number, since it is larger than the sum of its proper divisors (8455983).

23112561 is a wasteful number, since it uses less digits than its factorization.

23112561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187951.

The product of its digits is 360, while the sum is 21.

The square root of 23112561 is about 4807.5524958132. The cubic root of 23112561 is about 284.8498686044.

Adding to 23112561 its reverse (16521132), we get a palindrome (39633693).

The spelling of 23112561 in words is "twenty-three million, one hundred twelve thousand, five hundred sixty-one".