23032561 has 4 divisors (see below), whose sum is σ = 23117824. Its totient is φ = 22947300.

The previous prime is 23032547. The next prime is 23032567. The reversal of 23032561 is 16523032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23032561 - 2¹³ = 23024369 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23032567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42225 + ... + 42766.

It is an arithmetic number, because the mean of its divisors is an integer number (5779456).

Almost surely, 2^23032561 is an apocalyptic number.

It is an amenable number.

23032561 is a deficient number, since it is larger than the sum of its proper divisors (85263).

23032561 is an equidigital number, since it uses as much as digits as its factorization.

23032561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85262.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 23032561 is about 4799.2250416083. The cubic root of 23032561 is about 284.5208363760.

Adding to 23032561 its reverse (16523032), we get a palindrome (39555593).

The spelling of 23032561 in words is "twenty-three million, thirty-two thousand, five hundred sixty-one".