23045561 has 16 divisors (see below), whose sum is σ = 29512320. Its totient is φ = 17470080.

The previous prime is 23045497. The next prime is 23045573. The reversal of 23045561 is 16554032.

It is a cyclic number.

It is not a de Polignac number, because 23045561 - 2⁶ = 23045497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23045561.

It is not an unprimeable number, because it can be changed into a prime (23045161) 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, 1196 + ... + 6893.

It is an arithmetic number, because the mean of its divisors is an integer number (1844520).

Almost surely, 2^23045561 is an apocalyptic number.

It is an amenable number.

23045561 is a deficient number, since it is larger than the sum of its proper divisors (6466759).

23045561 is a wasteful number, since it uses less digits than its factorization.

23045561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8144.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 23045561 is about 4800.5792358839. The cubic root of 23045561 is about 284.5743559015.

Adding to 23045561 its reverse (16554032), we get a palindrome (39599593).

The spelling of 23045561 in words is "twenty-three million, forty-five thousand, five hundred sixty-one".