23328181 has 6 divisors (see below), whose sum is σ = 24620982. Its totient is φ = 22100040.

The previous prime is 23328113. The next prime is 23328197. The reversal of 23328181 is 18182332.

It can be written as a sum of positive squares in only one way, i.e., 12895281 + 10432900 = 3591^2 + 3230^2 .

It is not a de Polignac number, because 23328181 - 2⁹ = 23327669 is a prime.

It is a super-2 number, since 2×23328181² = 1088408057537522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23328281) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31950 + ... + 32671.

It is an arithmetic number, because the mean of its divisors is an integer number (4103497).

Almost surely, 2^23328181 is an apocalyptic number.

It is an amenable number.

23328181 is a deficient number, since it is larger than the sum of its proper divisors (1292801).

23328181 is an equidigital number, since it uses as much as digits as its factorization.

23328181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64659 (or 64640 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 23328181 is about 4829.9255687847. The cubic root of 23328181 is about 285.7329283431.

The spelling of 23328181 in words is "twenty-three million, three hundred twenty-eight thousand, one hundred eighty-one".