23216641 has 16 divisors (see below), whose sum is σ = 27360000. Its totient is φ = 19690944.

The previous prime is 23216621. The next prime is 23216663. The reversal of 23216641 is 14661232.

It is not a de Polignac number, because 23216641 - 2¹⁹ = 22692353 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23216621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38460 + ... + 39058.

It is an arithmetic number, because the mean of its divisors is an integer number (1710000).

Almost surely, 2^23216641 is an apocalyptic number.

It is an amenable number.

23216641 is a deficient number, since it is larger than the sum of its proper divisors (4143359).

23216641 is an equidigital number, since it uses as much as digits as its factorization.

23216641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 719 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 23216641 is about 4818.3649716475. The cubic root of 23216641 is about 285.2768050387.

Adding to 23216641 its reverse (14661232), we get a palindrome (37877873).

The spelling of 23216641 in words is "twenty-three million, two hundred sixteen thousand, six hundred forty-one".