23443521 has 8 divisors (see below), whose sum is σ = 31561920. Its totient is φ = 15477072.

The previous prime is 23443507. The next prime is 23443523. The reversal of 23443521 is 12534432.

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

It is not a de Polignac number, because 23443521 - 2⁵ = 23443489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23443491 and 23443500.

It is not an unprimeable number, because it can be changed into a prime (23443523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37626 + ... + 38243.

It is an arithmetic number, because the mean of its divisors is an integer number (3945240).

Almost surely, 2^23443521 is an apocalyptic number.

It is an amenable number.

23443521 is a deficient number, since it is larger than the sum of its proper divisors (8118399).

23443521 is a wasteful number, since it uses less digits than its factorization.

23443521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75975.

The product of its digits is 2880, while the sum is 24.

The square root of 23443521 is about 4841.8509890330. The cubic root of 23443521 is about 286.2030645826.

Adding to 23443521 its reverse (12534432), we get a palindrome (35977953).

The spelling of 23443521 in words is "twenty-three million, four hundred forty-three thousand, five hundred twenty-one".