23436561 has 8 divisors (see below), whose sum is σ = 31278240. Its totient is φ = 15609632.

The previous prime is 23436551. The next prime is 23436593. The reversal of 23436561 is 16563432.

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 23436561 - 2⁷ = 23436433 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (23436521) 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, 805 + ... + 6893.

It is an arithmetic number, because the mean of its divisors is an integer number (3909780).

Almost surely, 2^23436561 is an apocalyptic number.

It is an amenable number.

23436561 is a deficient number, since it is larger than the sum of its proper divisors (7841679).

23436561 is a wasteful number, since it uses less digits than its factorization.

23436561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7375.

The product of its digits is 12960, while the sum is 30.

The square root of 23436561 is about 4841.1322022849. The cubic root of 23436561 is about 286.1747387680.

Adding to 23436561 its reverse (16563432), we get a palindrome (39999993).

The spelling of 23436561 in words is "twenty-three million, four hundred thirty-six thousand, five hundred sixty-one".