23330561 has 4 divisors (see below), whose sum is σ = 23448000. Its totient is φ = 23213124.

The previous prime is 23330551. The next prime is 23330563. The reversal of 23330561 is 16503332.

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 a de Polignac number, because none of the positive numbers 2^k-23330561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23330563) 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, 58421 + ... + 58818.

It is an arithmetic number, because the mean of its divisors is an integer number (5862000).

Almost surely, 2^23330561 is an apocalyptic number.

It is an amenable number.

23330561 is a deficient number, since it is larger than the sum of its proper divisors (117439).

23330561 is a wasteful number, since it uses less digits than its factorization.

23330561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117438.

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 23330561 is about 4830.1719431093. The cubic root of 23330561 is about 285.7426450779.

Adding to 23330561 its reverse (16503332), we get a palindrome (39833893).

The spelling of 23330561 in words is "twenty-three million, three hundred thirty thousand, five hundred sixty-one".