23705561 has 8 divisors (see below), whose sum is σ = 25924800. Its totient is φ = 21497040.

The previous prime is 23705543. The next prime is 23705573. The reversal of 23705561 is 16550732.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23705561 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23705501) 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, 2375 + ... + 7283.

It is an arithmetic number, because the mean of its divisors is an integer number (3240600).

Almost surely, 2^23705561 is an apocalyptic number.

It is an amenable number.

23705561 is a deficient number, since it is larger than the sum of its proper divisors (2219239).

23705561 is a wasteful number, since it uses less digits than its factorization.

23705561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5359.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 23705561 is about 4868.8356924423. The cubic root of 23705561 is about 287.2654611442.

The spelling of 23705561 in words is "twenty-three million, seven hundred five thousand, five hundred sixty-one".