23745221 has 8 divisors (see below), whose sum is σ = 24366720. Its totient is φ = 23131872.

The previous prime is 23745217. The next prime is 23745247. The reversal of 23745221 is 12254732.

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 23745221 - 2² = 23745217 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 (23745521) 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, 4100 + ... + 8018.

It is an arithmetic number, because the mean of its divisors is an integer number (3045840).

Almost surely, 2^23745221 is an apocalyptic number.

It is an amenable number.

23745221 is a deficient number, since it is larger than the sum of its proper divisors (621499).

23745221 is an equidigital number, since it uses as much as digits as its factorization.

23745221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4075.

The product of its digits is 3360, while the sum is 26.

The square root of 23745221 is about 4872.9068326821. The cubic root of 23745221 is about 287.4255726686.

Adding to 23745221 its reverse (12254732), we get a palindrome (35999953).

The spelling of 23745221 in words is "twenty-three million, seven hundred forty-five thousand, two hundred twenty-one".